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picogram

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

noun

  1. one trillionth of a gram. pg

Etymology

Origin of picogram

First recorded in 1950–55; pico- + -gram 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

We naturally make melatonin in our brains, but only in picogram amounts, or one trillionth of a gram, which Dr. Rosen described as “a whiff of it coming out at dusk.”

From New York Times • Jan. 11, 2022

A picogram is a trillionth of a gram and is measured in milliliters.

From Los Angeles Times • May 10, 2021

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.