Definition of CH4. Meaning of CH4. Synonyms of CH4
Here you will find one or more explanations in English for the word CH4. Also in the bottom left of the page several parts of wikipedia pages related to the word CH4 and, of course, CH4 synonyms and on the right images related to the word CH4.
Definition of CH4
CH4 Methane Meth"ane, n. [See Methal.] (Chem.)
A light, colorless, gaseous, inflammable hydrocarbon, CH4;
marsh gas. See Marsh gas, under Gas.
Methane series (Chem.), a series of saturated hydrocarbons,
of which methane is the first member and type, and
(because of their general chemical inertness and
indifference) called also the paraffin (little affinity)
series. The lightest members are gases, as methane,
ethane; intermediate members are liquids, as hexane,
heptane, etc. (found in benzine, kerosene, etc.); while
the highest members are white, waxy, or fatty solids, as
CH4 Type Type, n. [F. type; cf. It. tipo, from L. typus a figure,
image, a form, type, character, Gr. ? the mark of a blow,
impression, form of character, model, from the root of ? to
beat, strike; cf. Skr. tup to hurt.]
1. The mark or impression of something; stamp; impressed
The faith they have in tennis, and tall stockings,
Short blistered breeches, and those types of travel.
2. Form or character impressed; style; semblance.
Thy father bears the type of king of Naples. --Shak.
3. A figure or representation of something to come; a token;
a sign; a symbol; -- correlative to antitype.
A type is no longer a type when the thing typified
comes to be actually exhibited. --South.
4. That which possesses or exemplifies characteristic
qualities; the representative. Specifically:
(a) (Biol.) A general form or structure common to a number
of individuals; hence, the ideal representation of a
species, genus, or other group, combining the
essential characteristics; an animal or plant
possessing or exemplifying the essential
characteristics of a species, genus, or other group.
Also, a group or division of animals having a certain
typical or characteristic structure of body maintained
within the group.
Since the time of Cuvier and Baer . . . the
whole animal kingdom has been universally held
to be divisible into a small number of main
divisions or types. --Haeckel.
(b) (Fine Arts) The original object, or class of objects,
scene, face, or conception, which becomes the subject
of a copy; esp., the design on the face of a medal or
(c) (Chem.) A simple compound, used as a mode or pattern
to which other compounds are conveniently regarded as
being related, and from which they may be actually or
Note: The fundamental types used to express the simplest and
most essential chemical relations are hydrochloric
acid, HCl; water, H2O; ammonia, NH3; and methane,
(a) A raised letter, figure, accent, or other character,
cast in metal or cut in wood, used in printing.
(b) Such letters or characters, in general, or the whole
quantity of them used in printing, spoken of
collectively; any number or mass of such letters or
characters, however disposed.
Note: Type are mostly made by casting type metal in a mold,
though some of the larger sizes are made from maple,
mahogany, or boxwood. In the cut, a is the body; b, the
face, or part from which the impression is taken; c,
the shoulder, or top of the body; d, the nick
(sometimes two or more are made), designed to assist
the compositor in distinguishing the bottom of the face
from the top; e, the groove made in the process of
finishing, -- each type as cast having attached to the
bottom of the body a jet, or small piece of metal
(formed by the surplus metal poured into the mold),
which, when broken off, leaves a roughness that
requires to be removed. The fine lines at the top and
bottom of a letter are technically called ceriphs, and
when part of the face projects over the body, as in the
letter f, the projection is called a kern. The type
which compose an ordinary book font consist of Roman
CAPITALS, small capitals, and lower-case letters, and
Italic CAPITALS and lower-case letters, with
accompanying figures, points, and reference marks, --
in all about two hundred characters. Including the
various modern styles of fancy type, some three or four
hundred varieties of face are made. Besides the
ordinary Roman and Italic, some of the most important
of the varieties are -- Old English. Black Letter. Old
Style. French Elzevir. Boldface. Antique. Clarendon.
Gothic. Typewriter. Script. The smallest body in common
use is diamond; then follow in order of size, pearl,
agate, nonpareil, minion, brevier, bourgeois (or
two-line diamond), long primer (or two-line pearl),
small pica (or two-line agate), pica (or two-line
nonpareil), English (or two-line minion), Columbian (or
two-line brevier), great primer (two-line bourgeois),
paragon (or two-line long primer), double small pica
(or two-line small pica), double pica (or two-line
pica), double English (or two-line English), double
great primer (or two-line great primer), double paragon
(or two-line paragon), canon (or two-line double pica).
Above this, the sizes are called five-line pica,
six-line pica, seven-line pica, and so on, being made
mostly of wood. The following alphabets show the
different sizes up to great primer. Brilliant . .
CH4 Carbureted Car"bu*ret`ed, a.
1. (Chem.) Combined with carbon in the manner of a carburet
2. Saturated or impregnated with some volatile carbon
compound; as, water gas is carbureted to increase its
illuminating power. [Written also carburetted.]
Carbureted hydrogen gas, any one of several gaseous
compounds of carbon and hydrogen, some of with make up
Light carbureted hydrogen, marsh gas, CH4; fire damp
CH4 Gas fitter, one who lays pipes and puts up fixtures for
(a) The occupation of a gas fitter.
(b) pl. The appliances needed for the introduction of gas
into a building, as meters, pipes, burners, etc.
Gas fixture, a device for conveying illuminating or
combustible gas from the pipe to the gas-burner,
consisting of an appendage of cast, wrought, or drawn
metal, with tubes upon which the burners, keys, etc., are
Gas generator, an apparatus in which gas is evolved; as:
(a) a retort in which volatile hydrocarbons are evolved by
(b) a machine in which air is saturated with the vapor of
liquid hydrocarbon; a carburetor;
(c) a machine for the production of carbonic acid gas, for
a["e]rating water, bread, etc. --Knight.
Gas jet, a flame of illuminating gas.
Gas machine, an apparatus for carbureting air for use as
Gas meter, an instrument for recording the quantity of gas
consumed in a given time, at a particular place.
Gas retort, a retort which contains the coal and other
materials, and in which the gas is generated, in the
manufacture of gas.
Gas stove, a stove for cooking or other purposes, heated by
Gas tar, coal tar.
Gas trap, a drain trap; a sewer trap. See 4th Trap, 5.
Gas washer (Gas Works), an apparatus within which gas from
the condenser is brought in contact with a falling stream
of water, to precipitate the tar remaining in it.
Gas water, water through which gas has been passed for
purification; -- called also gas liquor and ammoniacal
water, and used for the manufacture of sal ammoniac,
carbonate of ammonia, and Prussian blue. --Tomlinson.
Gas well, a deep boring, from which natural gas is
Gas works, a manufactory of gas, with all the machinery and
appurtenances; a place where gas is generated for lighting
Laughing gas. See under Laughing.
Marsh gas (Chem.), a light, combustible, gaseous
hydrocarbon, CH4, produced artificially by the dry
distillation of many organic substances, and occurring as
a natural product of decomposition in stagnant pools,
whence its name. It is an abundant ingredient of ordinary
illuminating gas, and is the first member of the paraffin
series. Called also methane, and in coal mines, fire
Natural gas, gas obtained from wells, etc., in
Pennsylvania, Ohio, and elsewhere, and largely used for
fuel and illuminating purposes. It is chiefly derived from
the Coal Measures.
Olefiant gas (Chem.). See Ethylene.
Water gas (Chem.), a kind of gas made by forcing steam over
glowing coals, whereby there results a mixture of hydrogen
and carbon monoxide. This gives a gas of intense heating
power, but destitute of light-giving properties, and which
is charged by passing through some volatile hydrocarbon,
CH4 Homology Ho*mol"o*gy, n. [Gr. ? agreement. See Homologous.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See Homotypy, and
3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
CH4, ethane, C2H6, propane, C3H8, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. Heterology.
General homology (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
Serial homology (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See Homotypy.
Special homology (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen.