zetta-(redirected from 1000000000000000000000)
Also found in: Dictionary, Encyclopedia.
Prefix used in the metric system and SI to signify one sextillion (1021).
[var. of L. septem, seven (zetta- being 7th in the series of SI multiple prefixes)]
zetta-[Fm. L. septem, seven, representing the seventh power of a thousand]
In the International System of Units (SI), a prefix signifying 1021 .