g

from The American Heritage® Dictionary of the English Language, 5th Edition.

• abbreviation acceleration of gravity
• abbreviation gram
• noun The seventh letter of the modern English alphabet.
• noun Any of the speech sounds represented by the letter g.
• noun The seventh in a series.
• noun Something shaped like the letter G.
• noun The fifth tone in the scale of C major or the seventh tone in the relative minor scale.
• noun A key or scale in which G is the tonic.
• noun A written or printed note representing this tone.
• noun A string, key, or pipe tuned to the pitch of this tone.

from The Century Dictionary.

• In music:
• In chem.:
• In electricity, a symbol for conductance, the reciprocal of resistance. See conductance.
• An abbreviation of genitive; of German and Germany; of gram; of gulf; in a log-book, of gloomy weather.

from the GNU version of the Collaborative International Dictionary of English.

• 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, §§ 231-6, 155, 176, 178, 179, 196, 211, 246.
• (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♯ (G sharp) is a tone intermediate between G and A.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The seventh letter of the basic modern Latin alphabet.
• noun Symbol for the gram, an SI unit of mass.
• noun Symbol for gravitational acceleration, approximately 9.81 m/s2 or 32 ft/sec2 at the earth's surface. Distinguished from G.
• noun Alternative form of ɡ (voiced velar stop).
• abbreviation physics A unit of gravitational acceleration.
• noun The seventh letter of the English alphabet, called gee and written in the Latin script.
• noun The ordinal number seventh, derived from this letter of the English alphabet, called gee and written in the Latin script.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a metric unit of weight equal to one thousandth of a kilogram
• noun a purine base found in DNA and RNA; pairs with cytosine
• noun a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes
• noun the cardinal number that is the product of 10 and 100
• noun the 7th letter of the Roman alphabet
• noun a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes
• noun 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
• noun one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
• noun (physics) the universal constant relating force to mass and distance in Newton's law of gravitation