picogram

[ pee-kuh-gram, pahy- ]
/ ˈpi kəˌgræm, ˈpaɪ- /

noun

one trillionth of a gram. Abbreviation: pg

Origin of picogram

First recorded in 1950–55; pico- + -gram2

Medical definitions for picogram

picogram
[ pēkə-grăm′, pī- ]

n.

One-trillionth (10-12) of a gram.