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milligram

American  
[mil-i-gram] / ˈmɪl ɪˌgræm /
especially British, milligramme

noun

  • milligrams
    plural
  1. a unit of mass or weight equal to one thousandth of a gram, and equivalent to 0.0154 grain. mg


milligram British  
/ ˈmɪlɪˌɡræm /

noun

  1.  mg.  one thousandth of a gram

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

milligram Scientific  
/ mĭlĭ-grăm′ /
  1. A unit of mass or weight in the metric system equal to 0.001 gram.

  2. See Table at measurement


Other Word Forms

Noun Inflected Forms

Etymology

Origin of milligram

From the French word milligramme, dating back to 1800–10. See milli-, -gram 2

Vocabulary lists containing milligram

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

A 2.4 milligram dose of CagriSema was evaluated against 15 milligrams of tirzepatide.

From Barron's Feb. 23, 2026

The Danish drugmaker is also awaiting regulatory approvals for a 7.2 milligram Wegovy shot from the U.S. and EU, with a decision from EU regulators expected in the first quarter.

From The Wall Street Journal Jan. 16, 2026

“We’re now looking at a potential 0.4 milligram per container THC limit, which effectively would outlaw full-spectrum chapstick, pet treats — I mean, a lot of things that are not necessarily psychoactive,” Gilkey said.

From Salon Nov. 25, 2025

The level is 0.032 milligram per kilogram of soil.

From Los Angeles Times Jul. 2, 2025

Its chain-reacting pile went live at the beginning of November and within six weeks was producing plutonium by the milligram, and soon by the gram.

From "Big Science" by Michael Hiltzik

After all, each 5.3-ounce cup contained about 32 milligrams of caffeine, or about a third of an 8-ounce cup of coffee.

From The Wall Street Journal Aug. 3, 2026

Their growth was inhibited at concentrations as low as 2.5 milligrams per milliliter.

From Science Daily Jun. 23, 2026

Wegovy HD is a once-weekly injection that contains 7.2 milligrams of active ingredient semaglutide, which the company has said offers the highest weight-loss of any Wegovy injection so far.

From The Wall Street Journal Jun. 8, 2026

Instead, the standard recommendation for pain relief during IUD insertion is to take 800 milligrams of ibuprofen an hour beforehand—a method that falls woefully short of addressing the intense discomfort experienced by many patients.

From Slate Jun. 7, 2026

A worker bee is just over a centimeter long and weighs only about sixty milligrams; nevertheless, she can fly with a load heavier than herself.

From "The Secret Life of Bees" by Sue Monk Kidd

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