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See searches and references containing TWO EARS-THEOREM!TWO EARS-THEOREM
Every simple polygon with more than three vertices has at least two ears
In geometry, the two ears theorem states that every simple polygon with more than three vertices has at least two ears, vertices that can be removed from
Two_ears_theorem
Point where two or more curves, lines, or edges meet
(see also convex polygon) According to the two ears theorem, every simple polygon has at least two ears. A principal vertex xi of a simple polygon P
Vertex_(geometry)
Partition of a simple polygon into triangles
the two ears theorem, as the fact that any simple polygon with at least 4 vertices without holes has at least two "ears", which are triangles with two sides
Polygon_triangulation
Shape with three sides
relationship to the ear, a vertex connected by two other vertices, the diagonal between which lies entirely within the polygon. The two ears theorem states that
Triangle
concavity of the polygon. Every simple polygon has at least two ears (this is the two ears theorem) and every non-convex simple polygon has at least one mouth
Anthropomorphic_polygon
Shape bounded by non-intersecting line segments
diagonal. According to the two ears theorem, every simple polygon that is not a triangle has at least two ears, vertices whose two neighbors are the endpoints
Simple_polygon
German-American mathematician (1878–1952)
group of a surface Non-Archimedean ordered field Scissors congruence Two ears theorem Undecidable problem The story of his travel in 1940 from Norway via
Max_Dehn
Polygon through a set of points
obtained by removing one vertex (proven to be possible by applying the two ears theorem to the exterior of the polygon). It then applies a reverse-search algorithm
Polygonalization
Partition of graph into sequence of paths
least two in G. An ear decomposition of G is a partition of its set of edges into a sequence of ears, such that the one or two endpoints of each ear belong
Ear_decomposition
Electronic music duo
Serpent" (2025), self-released "Theorem" (2025), self-released "Ne Plus Ultra" (2026), A24 Music Forde, Archie (2026-03-09). "ear are the no-caps, lower-case
Ear_(band)
Equivalence between strongly orientable graphs and bridgeless graphs
earlier ears in the sequence. (The two path endpoints may be equal, in which case the subgraph is a cycle.) Orienting the edges within each ear so that
Robbins'_theorem
Counterintuitive result in probability
The infinite monkey theorem states that a monkey hitting keys independently and at random on a typewriter keyboard for an infinite amount of time will
Infinite_monkey_theorem
British physicist, engineer and mathematician (1824–1907)
experiment) and indications that the equipartition theorem in statistical mechanics might break down. Two major physical theories were developed during the
Lord_Kelvin
Observation that no scientific discovery is named after its discoverer
Hubble's law, which was derived by Georges Lemaître two years before Edwin Hubble; the Pythagorean theorem, which was known to Babylonian and Indian mathematicians
Stigler's_law_of_eponymy
Field of knowledge
and proof to study and establish their properties, often expressed as theorems, formulas, and equations. Mathematics is used to model and solve problems
Mathematics
French mathematician, physicist and engineer (1854–1912)
theory. He famously introduced the concept of the Poincaré recurrence theorem, which states that a state will eventually return arbitrarily close to
Henri_Poincaré
Puzzle in logic and mathematics
The two envelopes problem, also known as the exchange paradox, is a paradox in probability theory. It is of special interest in decision theory and for
Two_envelopes_problem
Extraction of information and meaning from audio signals
due to the nature of having two ears, or auditory receptors. The difference in time it takes for a sound to reach both ears provides the necessary information
Audio_analysis
Relative importance of certain frequencies in a composite signal
is a square-integrable function) allows applying Parseval's theorem (or Plancherel's theorem). That is, ∫ − ∞ ∞ | x ( t ) | 2 d t = ∫ − ∞ ∞ | x ^ ( f )
Spectral_density
British physicist and popular science author (born 1964)
theoretical and particle physicist. His written works include Fermat's Last Theorem (in the United States titled Fermat's Enigma: The Epic Quest to Solve the
Simon_Singh
An expanding approvals rule (EAR) is a rule for multi-winner elections, which allows agents to express weak ordinal preferences (i.e., ranking with indifferences)
Expanding_approvals_rule
number equals the clique number. The perfect graph theorem and strong perfect graph theorem are two theorems about perfect graphs, the former proving that
Glossary_of_graph_theory
Greek philosopher (c. 570 – c. 495 BC)
with mathematical and scientific discoveries, such as the Pythagorean theorem, Pythagorean tuning, the five regular solids, the theory of proportions
Pythagoras
British film and television editor
Board. Audsley is married to fellow editor Joke van Wijk, together they have two children. Audsley has had a notable collaboration with the director Stephen
Mick_Audsley
American mathematician and computer scientist (1903–1995)
("decision problem"), the Frege–Church ontology, and the Church–Rosser theorem. Alongside his doctoral student Alan Turing, Church is considered one of
Alonzo_Church
1995 film by Terry Gilliam
Theorem in 2013, claims were made that Gilliam had meant it as part of a trilogy. A 2013 review for The Guardian said, "Calling it [The Zero Theorem]
12_Monkeys
Pythagoras was not the first to discover what is now called the Pythagorean theorem, as it was known and used by the Babylonians and Indians centuries before
List of common misconceptions about science, technology, and mathematics
List_of_common_misconceptions_about_science,_technology,_and_mathematics
Theory in economics
the Dutch disease can be explained by the Rybczynski theorem. Simple trade models suggest that a country should specialize in industries
Dutch_disease
President of the United States in 1881
aptitude for mathematics extended to his own proof of the Pythagorean theorem, published in 1876, and his advocacy of using statistics to inform government
James_A._Garfield
Five-pointed star polygon
goat of black magic, whose head may be drawn in the star, the two horns at the top, the ears to the right and left, the beard at the bottom. It is a sign
Pentagram
Representation of a signal as a rectangular wave with varying duty cycle
independent of whether the waveform is two-level or three-level. For comparison, the Nyquist–Shannon sampling theorem can be summarized as: If you have a
Pulse-width_modulation
Partition of a graph whose components are reachable from all vertices
previous subgraphs, or a path sharing its two endpoints with previous subgraphs. According to Robbins' theorem, an undirected graph may be oriented in such
Strongly_connected_component
Brault-Baron, Johann (2014-03-27). "Hypergraph Acyclicity Revisited". arXiv:1403.7076 [math.CO]. See Theorem 6 for the existence of an ear Yannakakis algorithm
GYO_algorithm
Graph which remains connected when fewer than k edges are removed
Menger's theorem provides an alternative and equivalent characterization, in terms of edge-disjoint paths in the graph. If and only if every two vertices
Edge_connectivity
American murder victim (1924–1947)
in L.A." Santa Cruz Sentinel. March 12, 1947. "THE BLACK DAHLIAS". The Theorem Factory. May 7, 2017. "Slain Woman's Husband Freed". The San Bernardino
Black_Dahlia
Edge whose deletion would disconnect a graph
component of the graph has an open ear decomposition, that each connected component is 2-edge-connected, or (by Robbins' theorem) that every connected component
Bridge_(graph_theory)
Mathematical function, inverse of an exponential function
Scientific, ISBN 978-981-256-080-3, OCLC 492669517, theorem 4.1 P. T. Bateman & Diamond 2004, Theorem 8.15 Slomson, Alan B. (1991), An introduction to combinatorics
Logarithm
Type of signal in signal processing
guaranteed by an extension of the Bochner–Minlos theorem, which goes under the name Bochner–Minlos–Sazanov theorem): Analogously to the case of the multivariate
White_noise
Fewest graph edges whose removal breaks all cycles
numbers of a topological space derived from the graph. It counts the ears in an ear decomposition of the graph, forms the basis of parameterized complexity
Cyclomatic_number
1st-century AD Greek philosopher, mathematician and music theorist
early mathematicians have studied and provided proofs of Nicomachus's theorem. Superparticular number Superpartient number Schueller 1988, pp. 138. Dillon
Nicomachus
Generalization of graph theory
replacement rules; Ramsey's theorem; Erdős–Ko–Rado theorem; Kruskal–Katona theorem on uniform hypergraphs; Hall-type theorems for hypergraphs. In directed
Hypergraph
Adjusting input/output impedances of an electrical circuit for some purpose
of the load is equal to the resistance of the source (see maximum power theorem for a mathematical proof). Impedance matching is not always necessary.
Impedance_matching
When a decision-maker's future preferences can contradict earlier preferences
Sirens' songs but mindful of the danger, Odysseus orders his men to stop their ears with beeswax and ties himself to the mast of the ship. Most importantly,
Dynamic_inconsistency
Harmful effect from negative belief
pharmacologically induced negative side effects such as the ringing in the ears caused by quinine. That is not to say that the patient's psychologically
Nocebo
American domestic terrorist (1942–2023)
Wedderburn's Theorem". American Mathematical Monthly. 71 (6): 652–653. doi:10.2307/2312328. JSTOR 2312328. A proof of Wedderburn's little theorem in abstract
Ted_Kaczynski
English polymath (1642–1727)
generalised the binomial theorem to any real number, introduced the Puiseux series, was the first to state Bézout's theorem, classified most of the cubic
Isaac_Newton
1890 detective novel by Arthur Conan Doyle
inspection of the body, Holmes discovers a poisonous thorn above Bartholomew's ear. The treasure box is also gone, though there is a hole in the ceiling where
The_Sign_of_the_Four
British physicist (1842–1919)
components of the sound and the difference in amplitude (level) between the two ears. Rayleigh received the degree of Doctor mathematicae (honoris causa) from
John William Strutt, 3rd Baron Rayleigh
John_William_Strutt,_3rd_Baron_Rayleigh
1996 video game
tells him that the world is Dela Grante; that its inhabitants have pointy ears (like Sayless and Illia); that she is guarding it from monsters arriving
Yu-no
English percussionist (born 1947)
in the 1985 film Water, and appears as a street commercial for The Zero Theorem. Cooper has continued recording and performing with Elton John on various
Ray_Cooper
List of terms created from a person's name
mechanical computer) Dumbo, American cartoon character – Dumbo ears (derogatory term for big ears) Robin Dunbar, British anthropologist – Dunbar's number John
List_of_eponyms_(A–K)
Indian inventions
number. Kosambi–Karhunen–Loève theorem (also known as the Karhunen–Loève theorem) The Kosambi-Karhunen-Loève theorem is a representation of a stochastic
List of Indian inventions and discoveries
List_of_Indian_inventions_and_discoveries
Family of shellfish, many edible
consists of two similarly shaped valves with a straight hinge line along the top, devoid of teeth, and producing a pair of flat wings or "ears" (sometimes
Scallop
Russian voice actress
began to show the ability to imitate various sounds. Her voice and musical ear became a serious reason to think about a creative profession. Yelena first
Yelena_Shulman
letter in 1850. Stokes' theorem generalises Green's theorem, which itself is a higher-dimensional version of the Fundamental Theorem of Calculus. Research
Mathematics, science, technology and engineering of the Victorian era
Mathematics,_science,_technology_and_engineering_of_the_Victorian_era
British author and scholar (1832–1898)
in linear algebra (e.g., the first printed proof of the Rouché–Capelli theorem), probability, and the study of elections (e.g., Dodgson's method) and
Lewis_Carroll
Character in L. Frank Baum's Land of Oz
Ph.D. diploma) from the Wizard, he incorrectly recites the Pythagorean theorem, emphasizing that the real gift bestowed upon the characters was confidence
Scarecrow_(Oz)
British science fiction writer (1917–2008)
before he died, he had reviewed the manuscript of his final work, The Last Theorem, on which he had collaborated by e-mail with contemporary Frederik Pohl
Arthur_C._Clarke
Beneficial symbiosis between species
such can be found in the oral and nasal cavities, as well as inside the ear canal. Other Staphylococcus species including S. warneri, S. lugdunensis
Commensalism
Measurement of a signal at discrete time intervals
approximately double-rate requirement is a consequence of the Nyquist theorem. Sampling rates higher than about 50 kHz to 60 kHz cannot supply more usable
Sampling_(signal_processing)
French philosopher and mathematician (1596–1650)
mathematics with Jacobus Golius, who confronted him with Pappus's hexagon theorem, and astronomy with Martin Hortensius. In October 1630, he had a falling-out
René_Descartes
Type of signal processing filter
image in the brain relies on the phase difference information from the two ears. A phase difference translates to a delay, which in turn can be interpreted
Lattice_phase_equaliser
American-bred Thoroughbred racehorse
his anxiety issues by removing the hood and stuffing cotton in the horse's ears for subsequent races. Despite his defeat, American Pharoah was moved up to
American_Pharoah
whether computers could calculate such possibilities; Gödel's incompleteness theorems; in 1974 the Arecibo Ionospheric Observatory found the Hulse–Taylor binary
List_of_Equinox_episodes
Misinterpretation of a spoken phrase
is based on the main character mishearing le théorème d'Archimède ("the theorem of Archimedes") in his mathematics class. Mondegreens are a well-known
Mondegreen
List of definitions of terms and concepts used in electrical engineering and electronics
demonstration of electromagnetic principles. Bartlett's bisection theorem A mathematical theorem used in network analysis. base load power plant An electric
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
1650 work by Athanasius Kircher
bottom left of the image Pythagoras sits, with one arm resting on this theorem and the other pointing towards a group of smiths, the sound of whose Pythagorean
Musurgia_Universalis
Movement disorder that causes involuntary tremors
highlighted that relying on brief, 90-second clinical tasks creates a "sampling theorem" problem. Because tremor amplitude fluctuates continuously throughout the
Essential_tremor
Change in sea level due to gravity
narratives. Aquaculture – Farming of aquatic organisms Clairaut's theorem – Theorem about gravityPages displaying short descriptions of redirect targets
Tide
Peter Lax, 99, Hungarian-born American mathematician (Lax equivalence theorem, Lax–Friedrichs method), Abel Prize laureate (2005), cardiac amyloidosis
Deaths_in_May_2025
Musical interval
by this interval would sound different from each other even to untrained ears, but would be close enough that they would be more likely interpreted as
Syntonic_comma
Electrophysiological method to record electrical activity of the brain
motorized cat ears. The headset is a NeuroSky MindWave unit with two motors on the headband where a cat's ears might be. Slipcovers shaped like cat ears sit over
Electroencephalography
Manga and anime
immediately after his birth and being capable of explaining the Pythagorean theorem and Kepler's laws of planetary motion. His name means "beginning". Voiced
Tensai_Bakabon
Battery of statistical tests
follow a known distribution. The name is based on the infinite monkey theorem. Count the 1 bits in each of either successive or chosen bytes. Convert
Diehard_tests
Strength of an object's radar echo
System Planning Corporation Target strength "Radar Cross Section, Optical Theorem, Physical Optics Approx, Radiation by Line Sources" on YouTube Knott, Eugene;
Radar_cross_section
Force distributed over an area
of temperature and pressure measurement technology Torricelli's law – Theorem in fluid mechanics Vacuum pump – Equipment generating a relative vacuum
Pressure
Philosophical system based on the teachings of Pythagoras
Early-Pythagorean philosophers proved simple geometrical theorems, including "the sum of the angles of a triangle equals two right angles". Pythagoreans also came up
Pythagoreanism
View that mind is a ubiquitous feature of reality
comes at the cost of accuracy. Hoffman offers the "fitness beats truth theorem" as mathematical proof that perceptions of reality bear little resemblance
Panpsychism
2009. "Collections Search | BFI | British Film Institute". "Fermat's Last Theorem - The TV Documentary". Retrieved March 1, 2009. "BBC Wildlife Special -
List of Nova episodes (seasons 21–40)
List_of_Nova_episodes_(seasons_21–40)
Virus that infects bacteria
that, another controlled clinical trial in Western Europe (treatment of ear infections caused by Pseudomonas aeruginosa) was reported in the journal
Bacteriophage
Galactic X-ray source in the constellation Cygnus that is very likely a black hole
caused by the neutron star's rotating magnetic field, but the no-hair theorem guarantees that the magnetic field of a black hole is exactly aligned with
Cygnus_X-1
) {\displaystyle (12,35,37)} as well as a statement of the Pythagorean theorem for the sides of a square: "The rope which is stretched across the diagonal
History of science and technology on the Indian subcontinent
History_of_science_and_technology_on_the_Indian_subcontinent
Infinite series summing alternating 1 and -1 terms
this limit is called the Abel sum of the original series, after Abel's theorem which guarantees that the procedure is consistent with ordinary summation
Grandi's_series
Russian brothers, writer duo
remnants in consciousness." Magic punishes the complacent: fur grows on their ears. In the final part of the novella, the Strugatskys present a heuristically
Arkady_and_Boris_Strugatsky
Chemistry Jeffrey Mandula (1962), physicist known for the Coleman–Mandula theorem Allen Neuringer (1962), psychologist, prominent in the field of the experimental
List of Columbia College people
List_of_Columbia_College_people
Audio device to detect the presence of bat sound signals
used by bats can be has high as 250 kHz.). The Nyquist–Shannon sampling theorem observes that the minimum sampling frequency required to record a signal
Bat_detector
John Casey (mathematician) (1820–1891) – Irish geometer known for Casey's theorem Giovanni Domenico Cassini (1625–1712) – first to observe four of Saturn's
List of lay Catholic scientists
List_of_lay_Catholic_scientists
groundbreaking contributions to abstract algebra and theoretical physics; Noether's Theorem Jean-Antoine Nollet (1700–1770), France – Electroscope Wilhelm Normann
List_of_inventors
Art created by non-human animals
Willard, a cat credited on physics papers Animals in art Infinite monkey theorem Daniel Groinowski, Aux commencements du rire moderne. L'esprit fumiste
Animal-made_art
Audio performance differences between technologies
frequency in a digital system is based on the Nyquist–Shannon sampling theorem. This states that a sampled signal can be reproduced exactly as long as
Comparison of analog and digital recording
Comparison_of_analog_and_digital_recording
British geophysicist (born 1942)
published a seminal paper with Bob Parker, which employed Euler's Fixed Point Theorem, in conjunction with magnetic anomalies and earthquakes to determine a
Dan_McKenzie_(geophysicist)
works of ancient mathematicians, the proposition known as Commandino's theorem first appears in his work on centers of gravity Giacomo Antonio Cortuso
List_of_Italian_scientists
Assumption that natural laws are constant through time and space
Uniformitarian Principle or Unifomitarian Hypothesis. Conservation law Noether's theorem Law of universal gravitation Astronomical spectroscopy Cosmological principle
Uniformitarianism
Work being continuously done without an external input of energy
laws are particularly robust from a mathematical perspective. Noether's theorem, which was proven mathematically in 1915, states that any conservation
Perpetual_motion
reminisces about being spanked, and Terry Gilliam discusses his film The Zero Theorem. 1,404 TBA Jeff Tweedy TBA September 22 9312 Afghan soldiers go missing
List of The Colbert Report episodes (2014)
List_of_The_Colbert_Report_episodes_(2014)
gravity of geometric figures through the quotient of two definite integrals, developing a "universal theorem" nowadays still considered the most general possible
List of Italian inventions and discoveries
List_of_Italian_inventions_and_discoveries
Geneticist and evolutionary biologist (1892–1964)
"A Mathematical Theory of Natural and Artificial Selection Part X. Some Theorems on Artificial Selection". Genetics. 19 (5): 412–429. doi:10.1093/genetics/19
J._B._S._Haldane
that the ancient Mesopotamians might have been aware of the Pythagorean theorem over a millennium before Pythagoras. Mathematical achievements from Mesopotamia
History_of_science
Political ideology
(2017). Grassroots: The Rise of the Radical Center and The Next West. Dog Ear Publishing. ISBN 978-1-4575-5431-5. George, Robert P.; West, Cornel (2025)
Radical_centrism
Sound transmission method
on each half of the frequency axis. This is consistent with Parseval's theorem. The modulation depth m is a convenient experimental parameter when assessing
Sound_from_ultrasound
TWO EARS-THEOREM
TWO EARS-THEOREM
Surname or Lastname
English
English : variant of Pearce.
Male
Polish
Polish form of Latin Ivo, IWO means "yew tree."
Male
English
 Aristocratic title transferred to byname and finally to forename, from Old English eorl, EARL means "nobleman, prince, warrior."
Surname or Lastname
English
English : variant of Marsh.French : habitational name from places so named in Ardèche, Ardennes, Gard, Loire, Nièvre, and Meurthe-et-Moselle, from the Latin personal name Marcius, used adjectivally.French : from the personal name Meard, Mard, Mart, vernacular forms of the saint’s name Médard. Morlet notes that there are a number of places called Saint-Mars, formerly recorded in Latin as Sanctus Medardus.French : from the name of the month, mars ‘ March’, denoting seed sown in March, and hence a metonymic name for an arable grower.French (De Mars) : habitational name from Mars in the Ardennes.Dutch : from a short form of the personal name Marsilius.
Surname or Lastname
English
English : originally, like most of the English names derived from the ranks of nobility, either a nickname or an occupational name for a servant employed in a noble household. The vocabulary word is a native one, from Old English eorl ‘nobleman’, and in the Middle Ages was often used as an equivalent of Norman Count.
Surname or Lastname
English (Midlands)
English (Midlands) : nickname for a dark-complexioned man, from Old English earp ‘swarthy’.Americanized spelling of German Erp.
Surname or Lastname
English
English : patronymic or metronymic from Eade.
Surname or Lastname
Irish (Kerry)
Irish (Kerry) : Anglicized form of Gaelic Mac Saoghair, which in turn may be a patronymic from a Gaelicized form of the Old English personal name Saeger (see 2 below).English : patronymic from a Middle English personal name Saher or Seir (see Sayer 1).Americanized form of French Cyr.Richard Sears came to Plymouth, MA, from England about 1630.
Girl/Female
British, English, Hindu, Indian
Ears
Male
Scandinavian
Scandinavian form of Icelandic Lárus, LARS means "laurel."
Surname or Lastname
English
English : patronymic from Fear.
Boy/Male
Anglo Saxon American English
Chief.
Surname or Lastname
English
English : from Earl with genitive -s, probably referring to a servant or retainer of a particular earl.
Girl/Female
Scottish
From the east.
Surname or Lastname
English (Essex)
English (Essex) : perhaps a variant of Airey.
Boy/Male
Anglo Saxon
Wretched.
Surname or Lastname
English
English : variant of Wear.
Surname or Lastname
English
English : variant of Gear.
Surname or Lastname
English
English : topographic name for someone who lived by a pond, Old English mere.English : topographic name for someone who lived near a boundary, Old English (ge)mǣre.
Male
Welsh
Welsh form of English Tom, TWM means "twin."
TWO EARS-THEOREM
TWO EARS-THEOREM
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Possessing Rich Jewels
Boy/Male
Hindu
From John
Surname or Lastname
English
English : habitational name from Lifton in Devon, named in Old English as ‘farmstead (Old English tūn) on the Lew’, a Celtic river name meaning ‘the bright one’.
Girl/Female
Tamil
Ishanika | இஷாநிகா
Fulfilling desire, Belonging to the north east
Boy/Male
Hindu
Boy/Male
Indian
Rock
Girl/Female
American, Australian, British, Chinese, Christian, Danish, English, Finnish, French, German, Latin, Polish, Slavic, Swedish
Youthful; Downy Bearded; Jove's Child; Youth; Sweetheart; From the Name Julia and Anne; Descended from Jupiter (Jove); Possibly Youth; Descended from Jupite
Male
Welsh
Welsh name ELIDYR means "brass, bronze."Â
Boy/Male
Indian, Punjabi, Sikh
Protected by the Lord
Girl/Female
Tamil
Ready to offer boons
TWO EARS-THEOREM
TWO EARS-THEOREM
TWO EARS-THEOREM
TWO EARS-THEOREM
TWO EARS-THEOREM
a.
Having large, pendent ears.
a.
Deafening; disagreeably loud or shrill; as, ear-splitting strains.
a.
Having ears. See Aurited.
v. i.
To put forth ears in growing; to form ears, as grain; as, this corn ears well.
n.
That which resembles in shape or position the ear of an animal; any prominence or projection on an object, -- usually one for support or attachment; a lug; a handle; as, the ears of a tub, a skillet, or dish. The ears of a boat are outside kneepieces near the bow. See Illust. of Bell.
n.
An instrument applied to the ears to give aid in hearing; a kind of ear trumpet.
n.
A nobleman of England ranking below a marquis, and above a viscount. The rank of an earl corresponds to that of a count (comte) in France, and graf in Germany. Hence the wife of an earl is still called countess. See Count.
n.
One and one; twice one.
n.
The organ of hearing; the external ear.
n.
The sense of hearing; the perception of sounds; the power of discriminating between different tones; as, a nice ear for music; -- in the singular only.
n.
A symbol representing two units, as 2, II., or ii.
a.
Having the ears cropped.
n.
The sum of one and one; the number next greater than one, and next less than three; two units or objects.
a.
Having external ears; having tufts of feathers resembling ears.
n.
A person or animal whose ears are cropped.
n.
The metallic element iron, the symbol of which / was the same as that of the planet Mars.
v. t.
To take in with the ears; to hear.
a.
Having the ear perforated.
v. t.
To acquire by labor, service, or performance; to deserve and receive as compensation or wages; as, to earn a good living; to earn honors or laurels.