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.
When pregnant, the RDA increases to 2.6 micrograms daily, while breastfeeding is 2.8 micrograms per day. Ashley Braun, Verywell Health, 1 July 2025 Generally, a healthy cortisol level should range anywhere between 10 to 20 micrograms per deciliter (mcg/dL) in the morning and at night. Audrey Noble, Vogue, 25 June 2025 Even at a dose of 187.5 micrograms of ethylmercury, no studies have shown adverse health effects or harm to humans, other than local skin reactions at the injection site of the vaccine, as shown in a study published in the journal Pediatrics. Omer Awan, Forbes.com, 22 June 2025 In 2001, the EPA announced its 10 micrograms per liter standard for arsenic. Jasmine Laws, MSNBC Newsweek, 19 June 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 11 Jul. 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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