picogram

[pee-kuh-gram, pahy-]

noun

one trillionth of a gram. Abbreviation: pg

Origin of picogram

First recorded in 1950–55; pico- + -gram2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

picogram in Medicine

picogram

[pēkə-grăm′, pī-]

n.

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.