Definition of pico- in English:

pico-

Syllabification: pico-

combining form

(Used in units of measurement) denoting a factor of 10−12: picogram

Origin

from Spanish pico, literally 'beak, peak, little bit'.

Definition of pico- in:

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Pronunciation: ˈnɔɪs(ə)m
adjective
having an extremely offensive smell