Gn. the 7th letter of the Roman alphabet ; Gn. (physics) the universal constant relating force to mass and distance in Newton's law of gravitation ; Gn. a unit of information equal to 1024 mebibytes or 2^30 (1,073,741,824) bytes ; Gn. a unit of information equal to 1000 megabytes or 10^9 (1,000,000,000) bytes ; gn. 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 ; gn. a metric unit of weight equal to one thousandth of a kilogram ; Gn. the cardinal number that is the product of 10 and 100 ; Gn. one of the four nucleotides used in building DNA ; all four nucleotides have a common phosphate group and a sugar (ribose) ; Gn. a purine base found in DNA and RNA ; pairs with cytosine ; G clefn. a clef that puts the G above middle C on the second line of a staff ; G suitn. pressure suit worn by fliers and astronauts to counteract the forces of gravity and acceleration ; g-forcen. 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 ; G-Jon. treatment of symptoms by applying pressure with the fingers to specific pressure points on the body ; G-mann. a special law-enforcement agent of the Federal Bureau of Investigation ; G-stringn. minimal clothing worn by stripteasers ; a narrow strip of fabric that covers the pubic area, passes between the thighs, and is supported by a waistband ;