From WordNet (r) 2.0 (August 2003) [wn]:
g
n 1: a metric unit of weight equal to one thousandth of a
kilogram [syn: gram, gramme, gm]
2: a purine base found in DNA and RNA; pairs with cytosine
[syn: guanine, G]
3: one of the four nucleotides used in building DNA; all four
nucleotides have a common phosphate group and a sugar
(ribose) [syn: deoxyguanosine monophosphate, G]
4: the cardinal number that is the product of 10 and 100 [syn:
thousand, one thousand, 1000, M, K, chiliad,
G, grand, thou, yard]
5: a unit of force equal to the force exerted by gravity; used
to indicate the force to which a body is subjected when it
is accelerated [syn: gee, g-force]
6: a unit of information equal to one billion (1,073,741,824)
bytes or 1024 megabytes [syn: gigabyte, G, GB]
7: (physics) the universal constant relating force to mass and
distance in Newton's law of gravitation [syn:
gravitational constant, {universal gravitational
constant}, constant of gravitation, G]
8: the 7th letter of the Roman alphabet [syn: G]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
G \G\ (j[=e])
1. G is the seventh letter of the English alphabet, and a
vocal consonant. It has two sounds; one simple, as in
gave, go, gull; the other compound (like that of j), as in
gem, gin, dingy. See Guide to Pronunciation, [sect][sect]
231-6, 155, 176, 178, 179, 196, 211, 246.
[1913 Webster]
Note: The form of G is from the Latin, in the alphabet which
it first appeared as a modified form of C. The name is
also from the Latin, and probably comes to us through
the French. Etymologically it is most closely related
to a c hard, k y, and w; as in corn, grain, kernel; kin
L. genus, Gr. ?; E. garden, yard; drag, draw; also to
ch and h; as in get, prehensile; guest, host (an army);
gall, choler; gust, choose. See C.
[1913 Webster]
2. (Mus.) G is the name of the fifth tone of the natural or
model scale; -- called also sol by the Italians and
French. It was also originally used as the treble clef,
and has gradually changed into the character represented
in the margin. See Clef. G[sharp] (G sharp) is a tone
intermediate between G and A.
[1913 Webster]