microgram definition

  • noun:
    • A unit of size add up to one thousandth (10-3) of a milligram or one millionth (10-6) of a gram.
    • A unit of size corresponding to 0.000 001 grams. Sign: μg or mcg
    • The millionth element of a gram, being about of a grain troy.
    • A photograph or a drawing of a microscopic item.
    • one millionth (1/1,000,000) gram

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