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microgram

1 American  
[mahy-kruh-gram] / ˈmaɪ krəˌgræm /
especially British, microgramme

noun

  1. a unit of mass or weight equal to one millionth of a gram, used chiefly in microchemistry. μg


microgram 2 American  
[mahy-kruh-gram] / ˈmaɪ krəˌgræm /

noun

  1. micrograph.


Etymology

Origin of microgram1

First recorded in 1885–90; micro- + -gram 2

Origin of microgram2

micro- + -gram 1


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:

According to the California Department of Public Health, the average blood lead level for adults in the United States is less than 1 microgram per deciliter.

From Los Angeles Times ● Mar. 27, 2025

Even with a supernova occurring within the so-called "kill radius" of less than ten parsecs, not even a microgram of matter from the envelope will land on each square centimeter.

From Science Daily ● Nov. 2, 2023

Emerade 300 and 500 microgram auto-injector pens, which treat anaphylaxis, are being recalled after some failed to deliver the dose of adrenaline.

From BBC ● May 9, 2023

They found that peanut, cashew, hazelnut, walnut, milk, and sesame allergens were incredibly low in the SpoonfulOne food puffs: less than 1 microgram of food allergen per gram of food puff.

From Slate ● Feb. 6, 2023

In the course of these investigations, balances that would weigh up to 10.5 mg with a sensitivity of 0.02 microgram were developed.

From A Brief History of Element Discovery, Synthesis, and Analysis by Glen W. Watson

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