Translingual

Noun

mcg

1. (medicine) (metrology) Symbol for the microgram, an SI unit of mass equal to 10⁻⁶ grams.

Synonyms

• µg

Usage notes

This abbreviation is used in the medical field instead of the standard abbreviation µg to avoid the chance that in handwritten dosing instructions it would be misread as mg ‎(“milligram”) resulting 1000 times the intended dose.