nanogram

American  

[nan-uh-gram, ney-nuh-] / ˈnæn əˌgræm, ˈneɪ nə- /

noun

1. one billionth of a gram. ng

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nanogram British  

/ ˈnænəʊˌɡræm /

noun

1.  ng.  one billionth (10 ^–9 ) of a gram

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Etymology

Origin of nanogram

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

Example Sentences

When it comes to the latter, exposure to 1 nanogram per cubic meter for 30 years is associated with a cancer risk of 360 cases in 1 million people, according to a state report.

From Los Angeles Times • Oct. 13, 2025

In a cubic meter of air, there may be only a nanogram of mercury, making it virtually impossible to detect via satellite.

From Science Daily • Nov. 1, 2023

Scientists at the agency have set a lifetime exposure to nitrosamine in medication at 37 nanogram per day, though it will allow up to 246 nanograms in sitagliptin for the time being.

From New York Times • Aug. 11, 2022

In contrast, Eleanor and Lorena’s relationship feels slapdash and underwritten, with Anderson and Rabe sharing less than a nanogram of chemistry.

From Washington Post • Apr. 14, 2022

Even botulism, the deadliest toxin ever known, needed at least 1 nanogram per kilogram to kill a human.

From "The Last Cuentista" by Donna Barba Higuera