nanogram

noun

nano·​gram ˈna-nə-ˌgram 

: one billionth of a gram

Examples of nanogram in a Sentence

Recent Examples on the Web

His blood had contained a hundred and ninety-five nanograms of THC per millilitre, which is thirty-nine times the legal threshold for a driver in Colorado. — Peter Hessler, New Yorker, 28 Sep. 2026

But doctors often diagnose low testosterone as below 300 nanograms per deciliter (ng/dl) across multiple tests. — Jackie Flynn Mogensen, Scientific American, 20 Aug. 2026

In order to be diagnosed with low testosterone, your provider will look for two readings below 300 nanograms per deciliter, along with clinical signs. — Teresa Maalouf, Verywell Health, 14 Aug. 2026

Endocrinologists consider testosterone levels between roughly 300 to 1,000 nanograms per deciliter as healthy. — Adam Stanaland, The Conversation, 20 July 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

1951, in the meaning defined above

Kids Definition

nanogram

noun

nano·​gram

ˈnan-ə-ˌgram

: one billionth of a gram

Medical Definition

nanogram

noun

nano·​gram

variants or chiefly British nanogramme

ˈnan-ə-ˌgram 

: one billionth of a gram

—abbreviation ng