milligram

noun

mil·​li·​gram ˈmi-lə-ˌgram 

: a unit of mass equal to ¹/₁₀₀₀ gram see Metric System Table

Examples of milligram in a Sentence

Recent Examples on the Web

Black Tea Black tea contains an average of 47 milligrams of caffeine per cup, a little more than half of what’s found in a cup of coffee. —Jillian Kubala, Health, 19 Oct. 2025

During the first six months of life, babies receive about four milligrams of aluminum from vaccines, 10 milligrams from breast milk or 40 milligrams from regular formula. —Humberto Basilio, Scientific American, 17 Oct. 2025

Unlike folic acid, which can be bought over the counter or prescribed at higher doses (typically 1 milligram), folinic acid—another type of folate—is only available by prescription. —Trang Tran, Verywell Health, 17 Oct. 2025

The legal driving limit in England and Wales, Coroner Nathanael Hartley said, is 80 milligrams per 100 milliliters of blood. —Abigail Adams, PEOPLE, 14 Oct. 2025

Word History

Etymology

French milligramme, from milli- + gramme gram

First Known Use

1797, in the meaning defined above

Rhymes for milligram

• abraham
• anagram
• cablegram
• cofferdam
• dendrogram
• diagram
• diaphragm
• epigram
• hexagram
• histogram
• hologram
• instagram

Kids Definition

milligram

noun

mil·​li·​gram ˈmil-ə-ˌgram 

: a weight equal to ¹⁄₁₀₀₀ gram see metric system

Medical Definition

milligram

noun

mil·​li·​gram

variants or chiefly British milligramme

-ˌgram 

: one thousandth of a gram

—abbreviation mg