microgram

noun

mi·​cro·​gram ˈmī-krə-ˌgram How to pronounce microgram (audio)
: one millionth of a gram see Metric System Table

Examples of microgram in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The World Health Organization (WHO) says average annual levels of PM2.5 should not exceed 5 micrograms per cubic meter. Rhea Mogul, CNN, 11 Mar. 2025 Though the World Health Organization recommends that average annual concentrations of PM2.5 should not exceed 5 micrograms per cubic meter, only 17% of cities worldwide meet its air quality standard, the report said. Peter Guo, NBC News, 11 Mar. 2025 The World Health Organization recommends 5 micrograms of pollutant per cubic meter. Kerry Breen, CBS News, 11 Mar. 2025 Iron doses in supplements are typically 18-65 micrograms. Jillian Kubala, Health, 17 Feb. 2025 See All Example Sentences for microgram

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1890, in the meaning defined above

Time Traveler
The first known use of microgram was circa 1890

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Cite this Entry

“Microgram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microgram. Accessed 28 Mar. 2025.

Medical Definition

microgram

noun
mi·​cro·​gram ˈmī-krə-ˌgram How to pronounce microgram (audio)
1
: one millionth of a gram
2

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