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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.
About five milligrams of that chemical, which is the main psychoactive component in marijuana, will make the occasional weed user feel a light buzz. Nicholas Florko, The Atlantic, 21 Nov. 2025 At higher doses, such as 1,000 milligrams, this amount can drop to about 50%. Merve Ceylan, Health, 20 Nov. 2025 This sleep aid by Life Time combines 300 milligrams of magnesium with ashwagandha and L-theanine. Noor Lobad, Footwear News, 19 Nov. 2025 Clinicians typically recommend two-milligram supplements, however. Lori Youmshajekian, Scientific American, 19 Nov. 2025 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

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Cite this Entry

“Milligram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/milligram. Accessed 29 Nov. 2025.

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
: one thousandth of a gram
abbreviation mg

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