1그램의 100만분의 1에 해당하는 질량 단위.
A unit of mass equal to one millionth of a gram, commonly used in pharmaceutical dosages.
예문:
"The recommended daily intake of this mineral is 55 mcg."
"Medical professionals use mcg to avoid confusion with the abbreviation for milligram."
"The test results showed a concentration of 10 mcg per deciliter."