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Gas made of free atoms
"monatomic" is a combination of the words "mono" and "atomic", and means "single atom". It is usually applied to gases: a monatomic gas is a gas in
Monatomic_gas
Mathematical model which approximates the behavior of real gases
gases behave qualitatively like an ideal gas, where the gas molecules (or atoms for monatomic gas) play the role of the ideal particles. Noble gases,
Ideal_gas
Physical constant equivalent to the Boltzmann constant, but in different units
} where γ0 is the heat capacity ratio (5/3 for monatomic gases such as argon); T is the temperature, TTPW = 273.16 K by the definition
Gas_constant
Heat required to raise the temperature of a given unit of mass of a substance
that substance than for a gram of a monatomic gas. Thus, the specific heat capacity per mole of a polyatomic gas depends both on the molecular mass and
Specific_heat_capacity
Chemical element with atomic number 2 (He)
number 2. It is a colorless, odorless, non-toxic, inert, monatomic gas and the first in the noble gas group in the periodic table. Its boiling point is the
Helium
Intensive quantity, heat capacity per amount of substance
twice as much energy as n atoms of a monatomic gas. One way to look at this result is to observe that the monatomic gas can only store energy as kinetic energy
Molar_heat_capacity
Chemical element with atomic number 10 (Ne)
atomic number 10. It is the second noble gas in the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with approximately
Neon
Equation of the state of a hypothetical ideal gas
state. Since the ideal gas law neglects both molecular size and intermolecular attractions, it is most accurate for monatomic gases at high temperatures
Ideal_gas_law
Speed of sound wave through elastic medium
for monatomic gases (such as argon) and it is 4/3 = 1.333 for triatomic molecule gases that, like H 2O, are not co-linear (a co-linear triatomic gas such
Speed_of_sound
Group of low-reactive, gaseous chemical elements
conditions, the first six of these elements are odorless, colorless, monatomic gases with very low chemical reactivity and cryogenic boiling points. The
Noble_gas
Physical quantity of hot and cold
temperature in gases. This theory also explains the ideal gas law and the observed heat capacity of monatomic (or 'noble') gases. The ideal gas law is based
Temperature
Understanding of gas properties in terms of molecular motion
D. A monatomic gas is axially symmetric about each spatial axis, so that D = 3 comprising translational motion along each axis. A diatomic gas is axially
Kinetic_theory_of_gases
Physical constant relating particle kinetic energy with temperature
is predicted to hold exactly for homogeneous ideal gases. Monatomic ideal gases (the six noble gases) possess three degrees of freedom per atom, corresponding
Boltzmann_constant
Low-Density Gases
ISSN 0264-3952. Chapman, S. (1918). "V. On the kinetic theory of a gas. Part II.—A composite monatomic gas: diffusion, viscosity, and thermal conduction". Philosophical
Rarefied_gas_dynamics
Expression of monatomic ideal gas entropy
The Sackur–Tetrode equation is an expression for the entropy of a monatomic ideal gas. It is named for Hugo Martin Tetrode (1895–1931) and Otto Sackur
Sackur–Tetrode_equation
Capacity of a material to conduct heat
convenient test of the theory. For monatomic gases, such as the noble gases, the agreement with experiment is fairly good. For gases whose molecules are not spherically
Thermal conductivity and resistivity
Thermal_conductivity_and_resistivity
Measure of temperature relative to absolute zero
defined changes in the pressure and temperature of certain gases. This is because monatomic gases like helium and argon behave kinetically like freely moving
Thermodynamic_temperature
Particle, atom or molecule with a net electrical charge
and He2+ (alpha particle, positively charged, monatomic). In the case of physical ionization in a fluid (gas or liquid), "ion pairs" are created by spontaneous
Ion
Physical law for entropy and heat
R. G. (1980). Fundamentals of Maxwell's Kinetic Theory of a Simple Monatomic Gas, Treated as a Branch of Rational Mechanics, Academic Press, New York
Second_law_of_thermodynamics
Chemical element with atomic number 1 (H)
departs from that of a diatomic gas below room temperature, and begins to increasingly resemble that of a monatomic gas at cryogenic temperatures. According
Hydrogen
Thermodynamic process in which no mass or heat is exchanged with surroundings
freedom (3 for a monatomic gas, 5 for a diatomic gas or a gas of linear molecules such as carbon dioxide). For a monatomic ideal gas, γ = 5/3, and for
Adiabatic_process
Heat-trapping gas in an atmosphere
A further 0.9% of the atmosphere is made up by argon (Ar), which is monatomic, and so completely transparent to thermal radiation. On the other hand
Greenhouse_gas
Thermodynamic quantity
{\text{or}}\quad f={\frac {2}{\gamma -1}}.} Thus we observe that for a monatomic gas, with 3 translational degrees of freedom per atom: γ = 5 3 = 1.6666
Heat_capacity_ratio
Ratio of kinematic viscosity to thermal diffusivity
conductivity. For most gases, Pr is approximately constant over a wide range of temperature and pressure. For monatomic gases, kinetic theory predicts
Prandtl_number
State of matter
molecular gases at STP are hydrogen (H2), nitrogen (N2), oxygen (O2), and two halogens: fluorine (F2) and chlorine (Cl2). When grouped with the monatomic noble
Gas
Chemical element with atomic number 86 (Rn)
human senses alone. At standard temperature and pressure, it forms a monatomic gas with a density of 9.73 kg/m3, about 8 times the density of the Earth's
Radon
dependence, ranging from rigorous first-principles calculations for monatomic gases, to empirical correlations for liquids. Understanding the temperature
Temperature dependence of viscosity
Temperature_dependence_of_viscosity
Specific probability distribution function, important in physics
distribution. This works well for nearly ideal, monatomic gases like helium, but also for molecular gases like diatomic oxygen. This is because despite
Maxwell–Boltzmann distribution
Maxwell–Boltzmann_distribution
Thermal quality
storing energy in a monatomic gas, as compared with regard to an ideal solid. There is some difference in the heat capacity of monatomic vs. polyatomic gasses
Volumetric_heat_capacity
Weak, attractive magnetism possessed by most elements and some compounds
pure paramagnet is a dilute gas of monatomic hydrogen atoms. Each atom has one non-interacting unpaired electron. A gas of lithium atoms already possess
Paramagnetism
Irreversible thermodynamic process in which a volume of gas expands into a vacuum
{\frac {V_{\text{f}}}{V_{\text{i}}}}.} For an ideal monatomic gas, the entropy as a function of the internal energy U, volume V, and number
Joule_expansion
Theorem in classical statistical mechanics
of a single spring. For example, it predicts that every atom in a monatomic ideal gas has an average kinetic energy of 3/2kBT in thermal equilibrium
Equipartition_theorem
Space of all possible states that a system can take
particle's x, y and z positions and momenta (6 dimensions for an idealized monatomic gas), and for more complex molecular systems additional dimensions are required
Phase_space
Development of the table of chemical elements
actual masses (cf. the illustration by Dalton above), because only monatomic gases were believed to exist. Even though Amedeo Avogadro and, independently
History_of_the_periodic_table
Hypothesis about sapient life and the universe
us. On the other hand, in view of creating black holes from an ideal monatomic gas under its self-gravity, Wei-Xiang Feng showed that (3 + 1)-dimensional
Anthropic_principle
Property of physical systems that stays somewhat constant through slow changes
phase-space volume of all gas states with energy E(T) and volume V. For a monatomic ideal gas, this can easily be seen by writing down the energy: E = 1 2 m ∑
Adiabatic_invariant
Gas used for human respiration
has six times the thermal conductivity. Helium's low molecular weight (monatomic MW=4, compared with diatomic nitrogen MW=28) increases the pitch of the
Breathing_gas
Size of an atom's imaginary sphere representing how close other atoms can get
experimental data derived from measurements on gases. For helium, b = 23.7 cm3/mol. Helium is a monatomic gas, and each mole of helium contains 6.022×1023
Van_der_Waals_radius
Star formation process
monatomic gas, the adiabatic index is 5/3. However, in astrophysical objects this value is usually close to 1 (for example, in partially ionized gas at
Jeans_instability
Resistance of a fluid to shear deformation
{\displaystyle 0} for a monatomic ideal gas, in which the internal energy of molecules is negligible, but is nonzero for a gas like carbon dioxide, whose
Viscosity
Branch of physics and acoustics
of governing equations of fluid dynamics (for sound waves in liquids and gases) and elasticity (for sound waves in solids). These equations are generally
Nonlinear_acoustics
Material property relevant for characterizing fluid flow
effect can be neglected. For instance, it is 0 in a monatomic gas at low density (unless the gas is moderately relativistic), whereas in an incompressible
Volume_viscosity
Chemical element with atomic number 54 (Xe)
ISBN 978-1-4832-8060-8. Cockett A, Smith K, Bartlett N (2013). The Chemistry of the Monatomic Gases: Pergamon Texts in Inorganic Chemistry. Elsevier Science. p. 292.
Xenon
Gaseous materials produced for use in industry
The noble gases are all monatomic. In the industrial gases industry the term "elemental gases" (or sometimes less accurately "molecular gases") is used
Industrial_gas
Equation of statistical mechanics
"Chapters 14 & 15". Fundamentals of Maxwell's Kinetic Theory of a Simple Monatomic Gas. Academic Press. ISBN 978-0-12-701350-3. Evans, Ben; Morgan, Ken; Hassan
Boltzmann_equation
Chemical element with atomic number 61 (Pm)
boiling point, ionic (Pm3+) radius, and standard heat of formation of monatomic gas are greater than those of samarium and less than those of neodymium
Promethium
Energy contained within a system
their diameter. Such systems approximate monatomic gases such as helium and other noble gases. For an ideal gas the kinetic energy consists only of the
Internal_energy
Independent parameter describing the state of a physical system
is why γ≈5/3 for monatomic gases and γ≈7/5 for diatomic gases at room temperature. Since the air is dominated by diatomic gases (with nitrogen and
Degrees of freedom (physics and chemistry)
Degrees_of_freedom_(physics_and_chemistry)
Mathematical model combining space and time
us. On the other hand, in view of creating black holes from an ideal monatomic gas under its self-gravity, Wei-Xiang Feng showed that (3 + 1)-dimensional
Spacetime
Any of the chemical elements in the second row of the periodic table
naturally as three stable isotopes: 20Ne, 21Ne and 22Ne. Neon is a monatomic gas. With a complete octet of outer electrons, it is highly resistant to
Period_2_element
Gas field in Potter County, Texas, US
helium gas production yields. The Amarillo plant operated from 1929 to 1943 producing helium meeting the global demand for the monatomic gas. In 1968
Cliffside_Gas_Field_(Texas)
Group of highly reactive chemical elements
such as Sn4−9, which appears in tetrapotassium nonastannide (K4Sn9). The monatomic plumbide ion (Pb4−) is unknown, and indeed its formation is predicted
Alkali_metal
Luminosity–temperature relationship in stars
ln T / d ln P = 0.4 {\displaystyle d\ln T/d\ln P=0.4} for a monatomic ideal gas undergoing adiabatic expansion or contraction. A temperature gradient
Hayashi_track
Enthalpy change needed to separate all atoms in a substance
the enthalpy of sublimation for any elemental solid that becomes a monatomic gas upon evaporation. When a diatomic element is converted to gaseous atoms
Enthalpy_of_atomization
Thermodynamic concept imporant in astrophysics
ratio (γ) for monatomic gas. For the interior of gaseous stars (consisting of either ionized hydrogen or helium), this follows from an ideal gas approximation
Polytrope
Law of thermodynamics establishing the conservation of energy
R. G. (1980). Fundamentals of Maxwell's Kinetic Theory of a Simple Monatomic Gas, Treated as a branch of Rational Mechanics, Academic Press, New York
First_law_of_thermodynamics
Greek god and personification of the Sun
helium, a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, first in the noble gas group in the periodic table, was named after Helios by Norman
Helios
Function describing equilibrium states of a system
the dimension of the state space of the system (D). For example, a monatomic gas with a fixed number of particles is a simple case of a two-dimensional
State_function
Chemical compounds containing at least one xenon atom
Cockett, A.H.; Smith, K.C.; Bartlett, N. (2013). The Chemistry of the Monatomic Gases: Pergamon Texts in Inorganic Chemistry. Elsevier Science. p. 292.
Xenon_compounds
Concept in physics
the shock wave can increase the density at most by a factor of 6. For monatomic gas, γ = 5 / 3 {\displaystyle \gamma =5/3} , the allowed interval is 1 /
Rankine–Hugoniot_conditions
Property of crosslinked rubber
there. The result is that an elastomer behaves somewhat like an ideal monatomic gas, inasmuch as (to good approximation) elastic polymers do not store any
Rubber_elasticity
Compressible flow velocity limiting effect
{\displaystyle p^{*}=0.528p_{0}} ; other gases have γ {\displaystyle \gamma } in the range 1.09 (e.g. butane) to 1.67 (monatomic gases), so the critical pressure ratio
Choked_flow
Solid consisting of discrete molecules
The constituents of molecular solids range in size from condensed monatomic gases to small molecules (i.e. naphthalene and water) to large molecules
Molecular_solid
Region of a star
the left-hand side is constant and equals 1/4, smaller than the ideal monatomic gas approximation for the right-hand side giving 1 − 1 / γ a d = 2 / 5 {\displaystyle
Radiative_zone
Italian mathematical physicist
Thermodynamics beyond the Monatomic Gas (Springer, 2015) and Classical and Relativistic Rational Extended Thermodynamics of Gases (Springer, 2021). In 2024
Tommaso_Ruggeri
Geochemical classification
liquids and/or gases at temperatures and pressures found on the surface. The noble gases do not form stable compounds and occur as monatomic gases, while nitrogen
Goldschmidt_classification
Construction element consisting of at least two glass plates
lower thermal conductivity gas. Gas convective heat transfer is a function of viscosity and specific heat. Monatomic gases such as argon, krypton, and
Insulated_glazing
Chemical element with atomic number 7 (N)
discovered that an electrical discharge in nitrogen gas produced "active nitrogen", a monatomic allotrope of nitrogen. The "whirling cloud of brilliant
Nitrogen
Sequence of organic compounds with similar chemical properties
same group (column) of the table. For example, all noble gases are colorless, monatomic gases with very low reactivity. These similarities are due to similar
Homologous_series
momentum states: Z ideal, monatomic = 1 h 3 ∫ d 3 r → ∫ d 3 p → e − β p → 2 / 2 m {\displaystyle Z_{\text{ideal, monatomic}}={\frac {1}{h^{3}}}\int d^{3}{\vec
Quantum_concentration
Molecule interaction model
corresponding van der Waals volume. In simplest case, for a spherical monatomic gas, it is simply the computed surface area of a sphere of radius equal
Van_der_Waals_surface
Type of high temperature plasma generated by electromagnetic induction
frequency and gas composition. The lower sustaining power setting is achieved with high r.f. frequency, low pressure, and monatomic gas, such as argon
Induction_plasma
Rocket engine
ideal Monatomic gas reaction mass, the maximum theoretical specific impulse is directly proportional to the thermal velocity of the heated gas: I sp =
Thermal_rocket
Theoretical gas model
simpler kinetic theory of gases, we expect the heat capacity of a monatomic ideal gas to be constant, since for such a gas only kinetic energy contributes
Perfect_gas
Molecule composed of any two atoms
also gases at STP, but they are monatomic. The homonuclear diatomic gases and noble gases together are called "elemental gases" or "molecular gases", to
Diatomic_molecule
Type of energy transfer
consideration. The specific heats of monatomic gases, such as helium, are nearly constant with temperature. Diatomic gases such as hydrogen display some temperature
Heat
Energy needed to remove an electron
measurement is performed in the gas phase on single atoms. While only noble gases occur as monatomic gases, other gases can be split into single atoms
Ionization_energy
Oil field in Clay County, Texas, U.S.
gas depletion of the fossil fuel reservoir production yield, the Petrolia helium plant sustained the non-reactive gas processing of the monatomic gas
Petrolia_Oil_Field_(Texas)
Short circular highly elastic rubber loop
state. The result is that a rubber band behaves somewhat like an ideal monatomic gas inasmuch as (to good approximation) that elastic polymers do not store
Rubber_band
German physicist (1839–1894)
collaboration with Emil Warburg, Kundt proved that mercury vapour is a monatomic gas. In light, Kundt's name is widely known for his inquiries in anomalous
August_Kundt
Chemical compound
A. H.; Smith, K. C.; Bartlett, Neil (2013). The Chemistry of the Monatomic Gases. Pergamon Texts in Inorganic Chemistry. St. Louis, MO: Elsevier Science
Xenon_difluoride
Measure of a substance's ability to resist or conduct electric current
water quality Conductivity is lowest with monatomic gases present; changes to 12×10−5 upon complete de-gassing, or to 7.5×10−5 upon equilibration to the
Electrical resistivity and conductivity
Electrical_resistivity_and_conductivity
Thermodynamic process in which pressure remains constant
are γ = 7/5 for diatomic gases like air and its major components, and γ = 5/3 for monatomic gases like the noble gases. The formulas for specific
Isobaric_process
Chemical element with atomic number 8 (O)
John Dalton's original atomic hypothesis presumed that all elements were monatomic and that the atoms in compounds would normally have the simplest atomic
Oxygen
Chemical reaction between a fuel and oxygen
oxidizing radicals. Oxidizing species include singlet oxygen, hydroxyl, monatomic oxygen, and hydroperoxyl. Such intermediates are short-lived and cannot
Combustion
Laser science process
1967 New et al. observed the first third harmonic generation in a gas. In monatomic gases it is only possible to produce odd numbered harmonics for reasons
High_harmonic_generation
Physical law about electrical discharge in gases
sections, that is, different effective diameters. Noble gases like helium and argon are monatomic, which makes them harder to ionize and tend to have smaller
Paschen's_law
Dispersion of gas by ionising radiation
{\displaystyle \gamma } is the ratio of specific heats (= 5/3 for a monatomic gas), G {\displaystyle G} the universal gravitational constant, M {\displaystyle
Photoevaporation
Molecule containing main group elements with more than eight valence electrons
ISSN 1755-4330. PMID 23609093. H., Cockett, A. (2013). The Chemistry of the Monatomic Gases : Pergamon Texts in Inorganic Chemistry. Smith, K. C., Bartlett, Neil
Hypervalent_molecule
Branch of logic
since a chemical molecule may sometimes have only one atom, as in monatomic gases.) The definition that "nothing else is a formula", given above as Definition
Propositional_logic
]/\rho \,} and γ = 5 / 3 {\displaystyle \gamma =5/3\,} for an ideal monatomic gas one finds K = k B T ( ρ / μ m H ) 2 / 3 , {\displaystyle K={\frac
Entropy_(astrophysics)
Parameter used to calculate the volume change of a fluid or solid in response to pressure
"notional" molar volume because a mole of oxygen, as O2, becomes 2 moles of monatomic oxygen and N2 similarly dissociates to 2 N. Since this occurs dynamically
Compressibility
Chemical decomposition caused by heat
3,630 °F), a small percentage of it will decompose into OH, monatomic oxygen, monatomic hydrogen, O2, and H2. The compound with the highest known decomposition
Thermal_decomposition
Change of enthalpy during the formation of a compound from its elements
various types of substances. For a gas, it is the hypothetical state the gas would assume if it obeyed the ideal gas equation at a pressure of 1 bar. For
Standard enthalpy of formation
Standard_enthalpy_of_formation
Chemical compound
A. H.; Smith, K. C.; Bartlett, Neil (1973). The Chemistry of the Monatomic Gases: Pergamon Texts in Inorganic Chemistry. Pergamon Press. ISBN 978-0-08-018782-2
Krypton_difluoride
Chemical compound
Cockett, A.H.; Smith, K.C.; Bartlett, N. (2013). The Chemistry of the Monatomic Gases: Pergamon Texts in Inorganic Chemistry. Elsevier Science. p. 292. ISBN 9781483157368
Xenon_tetrachloride
Spectral features due to inelastic interactions
mechanisms also exist in molecular (as opposed to monatomic) gases and in mixtures of gases, when molecular gases are present. Molecules have centers of positive
Collision-induced absorption and emission
Collision-induced_absorption_and_emission
Chemical element with atomic number 35 (Br)
orthorhombic structure. At 100 GPa it changes to a body centered orthorhombic monatomic form. Bromine has two stable isotopes, 79Br and 81Br. These are its only
Bromine
Soldier, engineer and inventor from the USA
for transport design equations, using helium as the monatomic gas and nitrogen as the diatomic gas. In the mid-1990s, Dr. Haraburda also designed Helical-coil
Scott_Haraburda
a monatomic (single atom) substance known as a reactive species is generated. Oxygen or fluorine are the most common reactive species. Other gases used
Plasma_ashing
MONATOMIC GAS
MONATOMIC GAS
Boy/Male
American, Australian, Basque, Chinese, Danish, French, German, Portuguese, Swedish
Man from Gascony; My God has Answered Me
Boy/Male
French
From Gascony.
Boy/Male
Indian
Good
Male
French
French form of Portuguese/Spanish Gaspar, GASPARD means "treasure bearer."Â
Male
French
Later form of French Gascon, GASTON means "from Gascony."Â
Male
Italian
Italian form of French Gaston, GASTONE means "from Gascony."
Surname or Lastname
English
English : variant of Gascon.
Surname or Lastname
English
English : variant spelling of Gascoigne.
Surname or Lastname
English
English : from Old French Gascogne ‘Gascony’, hence a regional name. The name of the region derives from that of the Basques, who are found close by and formerly extended into this region as well; they are first named in Roman sources as VascÅnes, but the original meaning of the name, derived from a root eusk- in the non-Indo-European language that they still speak today, is completely obscure. By the Middle Ages the Basques had been displaced from most of Gascony by speakers of Gascon (a dialect of Occitan, related to French), who were proverbial for their boastfulness. In the 11th century Gascony united with Aquitaine and was thus held by England between 1154 and 1453. See Gascon.
Surname or Lastname
English
English : occupational name for a jester, Middle English gester.German : from the Germanic personal name Gastharo, composed of the elements gast ‘warrior’ + heri ‘army’.
Male
Spanish
Portuguese and Spanish name GASPAR means "treasure bearer."Â
Boy/Male
French American
From Gascony.
Surname or Lastname
English (Lancashire)
English (Lancashire) : habitational name from Gatesgill in Cumbria, so named from Old Norse geit ‘goat’ + skáli ‘shelter’.
Male
Italian
Italian form of Portuguese/Spanish Gaspar, GASPARO means "treasure bearer."Â
Surname or Lastname
South German, Swiss, and Jewish (Ashkenazic)
South German, Swiss, and Jewish (Ashkenazic) : topographic name for someone who lived in a street in a city, town, or village, Middle High German gazze, German Gasse, Yiddish gas ‘street’, ‘side street’.English : variant of Gash.Altered spelling of German Gast, found in the areas of Swiss settlement.
Surname or Lastname
English and French
English and French : perhaps a variant of Garson.
Surname or Lastname
English (Yorkshire)
English (Yorkshire) : possibly a habitational name from Goosnargh in Lancashire, so named from the Old Irish personal name GussÄn + Old Norse erg ‘hill pasture’.Probably an Americanized form of German Gossner or Gössner, variants of Gassner.
Male
Italian
Italian form of Portuguese/Spanish Gaspar, GASPARE means "treasure bearer."Â
Surname or Lastname
English
English : variant spelling of Gaskill.
Surname or Lastname
English
English : variant of Gascon.
MONATOMIC GAS
MONATOMIC GAS
Girl/Female
Gujarati, Hindu, Indian
Worship; Long Practice; Study; Fulfilment; Achievement; Goddess Durga
Girl/Female
Arabic, Muslim
Light of Assembly
Girl/Female
Muslim
Brilliant, Whiteness
Girl/Female
Hindu
Boy/Male
African, American, Australian, British, Chinese, Christian, English, French, German, Jamaican, Latin, Scottish
Great Plains; Tall; Big; Large
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi
Wind
Girl/Female
Hindu
Name of a Raga
Boy/Male
Indian, Punjabi, Sanskrit, Sikh, Tamil
Devoted; Illuminating; Enlightening; Good Boy
Boy/Male
Australian, French, Italian, Latin, Portuguese
Fifth Son; Born in Fifth Month
Girl/Female
Tamil
Urvisha | உரà¯à®µà¯€à®·à®¾
Lord of the earth
MONATOMIC GAS
MONATOMIC GAS
MONATOMIC GAS
MONATOMIC GAS
MONATOMIC GAS
pl.
of Gastrula
a.
Having the structure, or performing the functions, both of digestive and circulatory organs; as, the gastrovascular cavity of c/lenterates.
a.
Alt. of Monotonical
n.
The process of invagination, in embryonic development, by which a gastrula is formed.
n.
An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastraea.
n.
Pertaining to the stomach and spleen; as, the gastrosplenic ligament.
a.
Of or relating to anatomy or dissection; as, the anatomic art; anatomical observations.
a.
Of or pertaining to a gastrula.
adv.
Consisting of, or containing, one atom; as, the molecule of mercury is monatomic.
a.
Pertaining to the Gastrura.
a.
Of or pertaining to gastroscopy.
adv.
Having the equivalence or replacing power of an atom of hydrogen; univalent; as, the methyl radical is monatomic.
n.
One of the Gastropoda.
a.
Pertaining to the alimentary canal and air passages, and to the cavities connected with them; as, the gastropneumatic mucuos membranes.
a.
Alt. of Anatomical
n.
A monatomic, hydrocarbon radical, C2H5 of the paraffin series, forming the essential radical of ethane, and of common alcohol and ether.
a.
Of or pertaining to the Gastropoda.
n.
Examination of the abdomen or stomach, as with the gastroscope.