| giga- [GIG uh or JIG uh] , gig- (Greek: "giant"; a decimal prefix used in the international metric system for measurements).Used in the extended sense of billion [U.S.] or thousand million fold [U.K.] in the metric [decimal] system: 109 [1 000 000 000]. The metric symbol is G.gigabit: gigabyte: gigacycle: gigaelectrovolt: gigaflop: gigaflop: A billion calculations per second., 
 gigahertz: gigajoules: gigameters (British: gigametres): gigapascal: gigavolt: gigawatt: gigohm: |