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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Most adults need 55 micrograms of the mineral per day, though people who are pregnant and breastfeeding need 60 to 70 mcg. Kathleen Ferraro, Verywell Health, 19 May 2025 Some samples returned from the moon’s nearside revealed about 1 to 200 micrograms of water per gram of other material, Hu says. Joshua Rapp Learn, Discover Magazine, 29 Apr. 2025 The city had an annual average concentration of 128.2 micrograms per cubic meter of air. Kerry Breen, CBS News, 11 Mar. 2025 GreenGuard Gold: An even more rigorous standard signifying that a product emits less than 220 micrograms per cubic meter in VOCs. Nashia Baker, Architectural Digest, 30 May 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 16 Jun. 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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