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A unit of mass equal to one thousandth (10-3) of a milligram or one millionth (10-6) of a gram.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Units) one millionth of a gram
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈmaɪ krəˌgræm)

a unit of mass or weight equal to one millionth of a gram. Symbol:μg
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.microgram - one millionth (1/1,000,000) gram
metric weight unit, weight unit - a decimal unit of weight based on the gram
mg, milligram - one thousandth (1/1,000) gram
nanogram, ng - one billionth (1/1,000,000,000) gram
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


n microgramo
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
References in periodicals archive ?
government made Microgram available to everyone online.
He explained that a microgram is one-millionth of a gram; 360 micrograms is about the weight of a few eyebrow hairs.
Microgram's release was mostly unnoticed, and its reception has been subdued--so subdued that even the chemical underground, where people in years past might have found in the newsletter a wealth of knowledge about how to synthesize and distribute psychoactive substances, has hardly noticed it.
The fish in the study were in water with a concentration of 11.6 micrograms of nonyl phenol per liter, a concentration level that has been detected in some drainage canals in Japan.
The BLL measures the quantity of lead in micrograms per deciliter of blood, written as ug/100 dL, that is, micrograms of lead per 100 deciliters of blood.(2)
This randomised, double-blind, placebo-controlled Phase Ib study involved 48 moderate-to-severe COPD patients who received a one hour intravenous infusion of MN-221 at three different escalating dose levels (300 micrograms, 600 micrograms, or 1200 micrograms) or placebo.
Those with lead levels above 2.9 had a kidney filtration rate 6.6 units (milliliters of blood filtered per minute and adjusted for body size) lower than children whose lead levels were below 1 microgram per deciliter.
In fact, microgram for microgram, lead may pack more punch below 10 [micro]g/dl than it does at higher concentrations, according to Richard L.
The study stated: "Following the first dose of vaccine, antibody titers of 1:40 or greater were observed in 161 of 174 infants and children in the 15-microgram group (92.5 percent) and in 168 of 172 infants and children in the 30 microgram group (97.7 percent).
Even at a concentration of just one microgram, it was able to prevent microbial growth.
One microgram of GE2 per milliliter of growing medium cut histamine release by about hall, and 10 micrograms per milliliter cut it by an average of 84%, compared to untreated cells.