from
The Collaborative International Dictionary of English v.0.48
Gas \Gas\ (g[a^]s), n.; pl. {Gases} (g[a^]s"[e^]z). [Invented by
the chemist Van Helmont of Brussels, who died in 1644.]
1. An a["e]riform fluid; -- a term used at first by chemists
as synonymous with air, but since restricted to fluids
supposed to be permanently elastic, as oxygen, hydrogen,
etc., in distinction from vapors, as steam, which become
liquid on a reduction of temperature. In present usage,
since all of the supposed permanent gases have been
liquified by cold and pressure, the term has resumed
nearly its original signification, and is applied to any
substance in the elastic or a["e]riform state.
[1913 Webster]
2. (Popular Usage)
(a) A complex mixture of gases, of which the most
important constituents are marsh gas, olefiant gas,
and hydrogen, artificially produced by the destructive
distillation of gas coal, or sometimes of peat, wood,
oil, resin, etc. It gives a brilliant light when
burned, and is the common gas used for illuminating
purposes.
(b) Laughing gas.
(c) Any irrespirable a["e]riform fluid.
[1913 Webster]
3. same as {gasoline}; -- a shortened form. Also, the
accelerator pedal of a motor vehicle; used in the term "
step on the gas".
[PJC]
4. the accelerator pedal of a motor vehicle; used in the term
" step on the gas".
[PJC]
5. Same as {natural gas}.
[PJC]
6. an exceptionally enjoyable event; a good time; as, The
concert was a gas. [slang]
[PJC]
Note: Gas is often used adjectively or in combination; as,
gas fitter or gasfitter; gas meter or gas-meter, etc.
[1913 Webster]
{Air gas} (Chem.), a kind of gas made by forcing air through
some volatile hydrocarbon, as the lighter petroleums. The
air is so saturated with combustible vapor as to be a
convenient illuminating and heating agent.
{Gas battery} (Elec.), a form of voltaic battery, in which
gases, especially hydrogen and oxygen, are the active
agents.
{Gas carbon}, {Gas coke}, etc. See under {Carbon}, {Coke},
etc.
{Gas coal}, a bituminous or hydrogenous coal yielding a high
percentage of volatile matters, and therefore available
for the manufacture of illuminating gas. --R. W. Raymond.
{Gas engine}, an engine in which the motion of the piston is
produced by the combustion or sudden production or
expansion of gas; -- especially, an engine in which an
explosive mixture of gas and air is forced into the
working cylinder and ignited there by a gas flame or an
electric spark.
[1913 Webster]
from
The Collaborative International Dictionary of English v.0.48
Carbon \Car"bon\ (k[aum]r"b[o^]n), n. [F. carbone, fr. L. carbo
coal; cf. Skr. [,c]r[=a] to cook.] (Chem.)
1. An elementary substance, not metallic in its nature, which
is present in all organic compounds. Atomic weight 11.97.
Symbol C. it is combustible, and forms the base of
lampblack and charcoal, and enters largely into mineral
coals. In its pure crystallized state it constitutes the
diamond, the hardest of known substances, occuring in
monometric crystals like the octahedron, etc. Another
modification is graphite, or blacklead, and in this it is
soft, and occurs in hexagonal prisms or tables. When
united with oxygen it forms carbon dioxide, commonly
called carbonic acid, or carbonic oxide, according to the
proportions of the oxygen; when united with hydrogen, it
forms various compounds called hydrocarbons. Compare
{Diamond}, and {Graphite}.
[1913 Webster]
2. (Elec.) A carbon rod or pencil used in an arc lamp; also,
a plate or piece of carbon used as one of the elements of
a voltaic battery.
[Webster 1913 Suppl.]
3. a sheet of carbon paper.
[PJC]
4. a carbon copy.
[PJC]
{Carbon compounds}, {Compounds of carbon} (Chem.), those
compounds consisting largely of carbon, commonly produced
by animals and plants, and hence called organic compounds,
though their synthesis may be effected in many cases in
the laboratory.
[1913 Webster]
The formation of the compounds of carbon is not
dependent upon the life process. --I. Remsen
{carbon copy}, originally, a copy of a document made by use
of a {carbon paper}, but now used generally to refer to
any copy of a document made by a mechanical process, such
as xerographic copying.
{Carbon dioxide}, {Carbon monoxide}. (Chem.) See under
{Carbonic}.
{Carbon light} (Elec.), an extremely brilliant electric light
produced by passing a galvanic current through two carbon
points kept constantly with their apexes neary in contact.
{Carbon point} (Elec.), a small cylinder or bit of gas carbon
moved forward by clockwork so that, as it is burned away
by the electric current, it shall constantly maintain its
proper relation to the opposing point.
{Carbon paper}, a thin type of paper coated with a
dark-colored waxy substance which can be transferred to
another sheet of paper underneath it by pressing on the
carbon paper. It is used by placing a sheet between two
sheets of ordinary writing paper, and then writing or
typing on the top sheet, by which process a copy of the
writing or typing is transferred to the second sheet
below, making a copy without the need for writing or
typing a second time. Multiple sheets may be used, with a
carbon paper placed above each plain paper to which an
impression is to be transferred. In 1997 such paper was
still used, particularly to make multiple copies of
filled-in purchase invoice forms, but in most applications
this technique has been superseded by the more faithful
xerographic reproduction and computerized printing
processes.
{Carbon tissue}, paper coated with gelatine and pigment, used
in the autotype process of photography. --Abney.
{Gas carbon}, a compact variety of carbon obtained as an
incrustation on the interior of gas retorts, and used for
the manufacture of the carbon rods of pencils for the
voltaic, arc, and for the plates of voltaic batteries,
etc.
[1913 Webster]