Pico- Definition

pēkō, pīkō; pēkə, pīkə
prefix
One trillionth (10−12 ).
Picosecond.
American Heritage
Very small.
Picornavirus.
American Heritage
affix
One trillionth part of; the factor 10-12
Picometer.
Webster's New World
pronoun

An island in the Azores.

Wiktionary

Origin of Pico-

  • Spanish pico beak, small quantity from Latin beccus beak of Celtic origin (influenced by Spanish picar to prick)

    From American Heritage Dictionary of the English Language, 5th Edition

  • prob. < It piccolo, small

    From Webster's New World College Dictionary, 5th Edition

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