nanogram

[nan-uh-gram, ney-nuh-]

noun

1. one billionth of a gram. ng

nanogram

/ ˈnænəʊˌɡræm /

noun

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

Word History and Origins

Origin of nanogram¹

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.

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More than four in 10 tested positive for pot’s psychoactive ingredient THC, with an average level of 30.7 nanograms.

Read more on The Wall Street Journal

For the experiment, researchers exposed silverside embryos to the different pesticides for 96 hours, at a concentration of 1 nanogram of pesticide per liter of water.

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

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Currently drinking water in the UK is categorised as medium-risk if there are between 10 and 100 nanograms of specific types of PFAS.

Read more on BBC