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 All participants in the initial part of Moderna's KidCOVE study will receive two 25, 50 or 100 microgram doses of the vaccine, so researchers can determine the appropriate dosing. Lauren Mascarenhas, CNN, 23 Mar. 2021 For example, if a 50-microgram dose and a 100-microgram dose both produce roughly the same level of antibodies in a child, researchers will probably use the 50 microgram dose. Amanda Morris, The Arizona Republic, 24 Mar. 2021 Children between the ages of two and 11 will receive two doses of the vaccine spaced about 28 days apart at either a 50 or 100 microgram level. Cassidy Morrison, Washington Examiner, 16 Mar. 2021 Children between the ages of 2 and 11 will receive two doses of the vaccine spaced about 28 days apart at either a 50 or a 100 microgram level. John Bonifield, CNN, 16 Mar. 2021 In that range, studies have found that each additional microgram correlates to an additional 8% risk of death for COVID-19 patients, Pozzer said. Janna Brancolini, Los Angeles Times, 5 Mar. 2021 Yadav said the finish-and-fill process was automated to prevent contamination and ensure precise dosing to the microgram. Noah Weiland, BostonGlobe.com, 2 Feb. 2021 In one analysis by Harvard researchers, just one additional microgram of fine particulates in the air was linked to an eight percent increase in COVID-19 death rates. Ula Chrobak, Popular Science, 10 Dec. 2020 Her blood lead levels tested at 4 micrograms per deciliter of lead, just below the 5 microgram level. Freep.com, 7 June 2019

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.

See More

First Known Use of microgram

circa 1890, in the meaning defined above

History and Etymology for microgram

International Scientific Vocabulary

Keep scrolling for more

Learn More About microgram

Time Traveler for microgram

Time Traveler

The first known use of microgram was circa 1890

See more words from the same year

Statistics for microgram

Last Updated

27 May 2021

Cite this Entry

“Microgram.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microgram. Accessed 23 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

Keep scrolling for more

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


Test Your Vocabulary

Return of Name that Color!

  • a light greenish blue color
  • Name that color:
Name That Thing

Test your visual vocabulary with our 10-question challenge!


Anagram puzzles meet word search.

Love words? Need even more definitions?

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