Gigaton

Noun

1. A measure of the strength of an explosion or a bomb based on how many billion tons of TNT would be needed to produce the same energy. (A derived unit for TNT equivalent.)
2. One billion tons. One billion short tons (10⁹ × 2000 lb). One billion long tons (10⁹ × 2240 lb). One billion metric tons (10⁹ × 2204.6 lb).
3. One billion short tons (10⁹ × 2000 lb).
4. One billion long tons (10⁹ × 2240 lb).
5. One billion metric tons (10⁹ × 2204.6 lb).