mi·​cro·​gram | \ ˈmī-krə-ˌgram How to pronounce microgram (audio) \

Definition of microgram

: one millionth of a gram — see Metric System Table

Examples of microgram in a Sentence

Recent Examples on the Web For every two microgram increase in blood lead levels, a child loses approximately one IQ point. Michael J. Coren, Quartz, 16 June 2022 Enlarge / Managing a microgram might be a case where blockchain is actually useful. John Timmer, Ars Technica, 5 June 2022 The two 25 microgram shots, given four weeks apart, generated immune responses similar to what was seen in adults 18 to 25 years old after two doses. Helen Branswell, STAT, 24 May 2022 For the Pfizer-BioNTech vaccine, adults receive two 30 microgram doses three weeks apart followed by a booster at least five months later. Karen Weintraub, USA TODAY, 15 June 2022 Pfizer had started its trial with two 10 microgram dose for children, which the company found wasn't effective enough for certain age groups and expects results from a third dose in the weeks ahead. Mary Kekatos, ABC News, 23 Mar. 2022 But in the antibody realm, two doses of Pfizer’s three-microgram dose, which is still in trials, fell short in the 2-to-4-year-old group, prompting the company to add a third shot for all kids younger than 5. Katherine J. Wu, The Atlantic, 29 Mar. 2022 The second booster of the Pfizer-BioNTech vaccine would use the same, 30 microgram dose as the first three administered. Stephanie Armour, WSJ, 29 Mar. 2022 At first, clinicians tried the 10 microgram dose for the younger children but some experienced mild fever. Terry Demio, The Enquirer, 11 Feb. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'microgram.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of microgram

circa 1890, in the meaning defined above

History and Etymology for microgram

International Scientific Vocabulary

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Time Traveler for microgram

Time Traveler

The first known use of microgram was circa 1890

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Statistics for microgram

Last Updated

26 Jul 2022

Cite this Entry

“Microgram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microgram. Accessed 17 Aug. 2022.

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More Definitions for microgram


mi·​cro·​gram | \ ˈmī-krə-ˌgram How to pronounce microgram (audio) \

Medical Definition of microgram

1 : one millionth of a gram

More from Merriam-Webster on microgram

Britannica.com: Encyclopedia article about microgram


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