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gigaton

[gig-uh-tuhn, jig-]
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noun
  1. one billion tons. Abbreviation: GT

Origin of gigaton

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for gigaton

n.

by 1977, from giga- + ton.

Online Etymology Dictionary, © 2010 Douglas Harper