Giga- Definition
gigə; also gīgə, jigə
prefix
One billion (109 ).
Gigahertz.
American Heritage
1,073,741,824 (230 ).
Gigabyte.
American Heritage
affix
One billion; the factor 109
Gigaton.
Webster's New World
Origin of Giga-
-
From Ancient Greek γίγας (gigas, “giant”); cognate to giant.
From Wiktionary
From Greek gigās giant
From American Heritage Dictionary of the English Language, 5th Edition
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