Definition of zetta- in English:

zetta-

Pronunciation: /ˈzɛtə/

combining form

(Used in units of measurement) denoting a factor of 1021: zettahertz

Origin

apparently adapted from Italian sette 'seven' (see also zepto-).

Definition of zetta- in:

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Word of the day setose
Pronunciation: ˈsēˌtōs
adjective
bearing bristles or setae; bristly