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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.
That small feat—producing just tens of micrograms—was heralded as a technology transfer milestone. Srishti Gupta, Interesting Engineering, 19 Nov. 2025 Supplements may contain daily doses ranging from 1,000 to 5,000 micrograms (mcg), equal to 1 to 5 milligrams (mg). Lindsay Curtis, Verywell Health, 12 Nov. 2025 The World Health Organization recommends that average annual concentrations not exceed 10 micrograms per cubic meter, with daily levels under 20 micrograms per cubic meter. Lisa Wood Shapiro, Wired News, 8 Nov. 2025 What To Know According to The State of Global Air map, parts of the southwestern U.S. were among the regions where eight-hour average ozone levels exceeded the World Health Organization's least stringent interim target of 100 micrograms per cubic meter (µg/m³) during peak season in 2020. Joe Edwards, MSNBC Newsweek, 29 Oct. 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 27 Nov. 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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