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microgram1

[mahy-kruh-gram]
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noun
  1. a unit of mass or weight equal to one millionth of a gram, used chiefly in microchemistry. Symbol: μg
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Also especially British, mi·cro·gramme.

Origin of microgram1

First recorded in 1885–90; micro- + -gram2

microgram2

[mahy-kruh-gram]
noun
  1. micrograph(def 2).
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Origin of microgram2

micro- + -gram1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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

(mī′krə-grăm′)
n.
  1. A unit of weight equal to one-millionth (10-6) of a gram.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.