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microgram1

or (especially British) microgramme

[mahy-kruh-gram] /ˈmaɪ krəˌgræm/
noun
1.
a unit of mass or weight equal to one millionth of a gram, used chiefly in microchemistry. Symbol: μg.
Origin of microgram1
1885-1890
1885-90; micro- + -gram2

microgram2

[mahy-kruh-gram] /ˈmaɪ krəˌgræm/
noun
1.
micrograph (def 2).
Origin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for microgram
Historical Examples
  • It was balanced to a microgram—to a millionth of the combined weight of three aspirin tablets.

    Space Platform Murray Leinster
microgram in Medicine

microgram mi·cro·gram (mī'krə-grām')
n.

Abbr. μg A unit of weight equal to one-millionth (10-6) of a gram.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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