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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Just four micrograms — 15 times smaller than a grain of table salt — can be concerning for human health because this this small level of exposure can affect neurological development, behavior and academic outcomes. Félix E. Rivera-Mariani, Sun Sentinel, 10 Apr. 2025 In comparison, adults need between 900 to 10,000 micrograms daily of copper, another trace element, and between 8,000 to 40,000 micrograms of the trace element zinc. Aliasger K. Salem, The Conversation, 25 Feb. 2025 Ultra Low Dose Ultra-low-dose birth control pills have between 10-20 micrograms of estrogen. Wendy Wisner, Health, 23 Feb. 2025 Japan’s Hayabusa mission in 2010 delivered to Earth a few micrograms of material from an asteroid called Itokawa. Denise Chow, NBC News, 29 Jan. 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 13 May. 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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