/gil'y*n/ or /jil'y*n/ n. [formed from giga- by analogy with mega/million and tera/trillion] 10^9. Same as an American billion or a British `milliard'. How one pronounces this depends on whether one speaks giga- with a hard or soft `g'.
unit /gil'y*n/ or /jil'y*n/ (From giga- by analogy with mega/million and tera/trillion) 10^9. Same as an American billion or a British "milliard". How one pronounces this depends on whether one speaks giga- with a hard or soft "g". [Jargon File] (1995-03-17)