What does 'mcg' stand for in measurements?

The abbreviation 'mcg' stands for microgram. In scientific measurements, a microgram is a unit of mass equal to one-millionth of a gram. It is commonly used in pharmacology and laboratory contexts to express very small quantities of substances, such as medications or other compounds. Understanding this measurement is crucial for nurses and healthcare professionals, as accurate dosing can significantly impact patient care and outcomes.

The other choices, while representing important measurements in their own right, do not correspond to the abbreviation 'mcg': milligram is 'mg', millimeter is 'mm', and microliter is 'µL'. Each of these units serves different purposes in measurements, but 'mcg' specifically identifies a microgram, highlighting its importance in fields that require precise dosing.