picogram

picogram

[pee-kuh-gram, pahy-]
noun
one trillionth of a gram. Abbreviation: pg

Origin:
1950–55; pico- + -gram2

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American Heritage
Medical Dictionary

picogram pi·co·gram (pē'kə-grām', pī'-)
n.
Abbr. pg
One-trillionth (10-12) of a gram.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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