milligram

noun

mil·​li·​gram ˈmi-lə-ˌgram How to pronounce milligram (audio)
: a unit of mass equal to 1/1000 gram see Metric System Table

Examples of milligram 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.
The study authors calculated a 23 percent lower cancer risk for each additional 300 milligrams (mg) of daily calcium and a 28 percent lower risk for each additional 10 g of daily fiber. — Emily Kay Votruba, EverydayHealth.com, 15 Oct. 2026 Over the course of a day, the kidneys filter roughly 2,400 milligrams (mg) of magnesium, return about 2,300 mg to the blood, and remove around 100 mg in urine. — Md Published, Verywell Health, 14 Oct. 2026 Researchers gathered 62 people who had never taken a psychedelic before, gave them 19 milligrams of psilocybin, a common psychedelic found in certain fungi, and scanned their brains. — Jacek Krywko, ArsTechnica, 10 Oct. 2026 Dudash cites examples ranging from 210 milligrams in 3 ounces of Safe Catch Wild Elite Pure Tuna to 410 milligrams in 3 ounces of Bumble Bee Whole Oysters. — Jo Ann Liguori, Flow Space, 5 Oct. 2026 See All Example Sentences for milligram

Word History

Etymology

French milligramme, from milli- + gramme gram

First Known Use

1797, in the meaning defined above

Time Traveler
The first known use of milligram was in 1797

Rhymes for milligram

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Browse Nearby Words

milligauss
milligram
millihenry
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Cite this Entry

“Milligram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/milligram. Accessed 20 Oct. 2026.

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Kids Definition

milligram

noun
mil·​li·​gram ˈmil-ə-ˌgram How to pronounce milligram (audio)
: a weight equal to ¹⁄₁₀₀₀ gram see metric system

Medical Definition

milligram

noun
mil·​li·​gram
variants or chiefly British milligramme
-ˌgram How to pronounce milligram (audio)
: one thousandth of a gram
—abbreviation mg

More from Merriam-Webster on milligram

Britannica.com: Encyclopedia article about milligram

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