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 600 to 800 milligrams of Shatavari root per day can be used to improve hormonal balance. Michelle Del Rey, USA Today, 18 May 2026 Some nitazenes are so powerful that under 2 milligrams—the equivalent of a few grains of sand—can kill a person by shutting down breathing. The Week Us, TheWeek, 18 May 2026 At the 300-milligram dose — the amount that will be used in larger phase 3 trials — about 30% of patients saw a positive response, researchers noted. Angelica Stabile, FOXNews.com, 18 May 2026 The postbiotic energy drinks contain 100 milligrams of caffeine from natural sources, along with zero sugar and no artificial colors, flavors or sweeteners. Ryan Brennan may 18, Charlotte Observer, 18 May 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

Browse Nearby Words

Cite this Entry

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

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

More from Merriam-Webster on milligram

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster