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
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In their paper, the researchers reported the median concentration of microplastics in 24 human brains from 2024 was nearly 5,000 micrograms per gram, though there is a fair amount of uncertainty in that estimate because of the methods used to calculate it. Nina Agrawal, New York Times, 8 Apr. 2025 The average concentration of PM2.5 particle specific to wildfires during that period was 6.95 micrograms per cubic meter of air (μg/m3). Paul Smaglik, Discover Magazine, 4 Apr. 2025 Berkeley Lab’s experiment acquired just 0.3 micrograms for its experiment. Chase Hunter, Mercury News, 26 Mar. 2025 Iodine intake over 1,100 micrograms (mcg) is considered dangerous. Adrienne Dellwo, Verywell Health, 14 Mar. 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 22 Apr. 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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