(pharmacology) A particular, minute unit of mass, defined differently for different substances, but so that varying substances of the same general type have the property that one international unit of the one has the same effect on the human body as one international unit of the other.

plural of international unit

(archaeology) A pit, trench, shovel test hole, (etc.) or other result of scientific excavation.

The cost to acquire a unit of a good or service for a specific quantity that is purchased.

plural of unit cost

(historical) The Thirteen Colonies that became the United States of America.

plural of excavation unit

(physics) Alternative form of angstrom

A unit of potency of drugs, used in the United States Pharmacopeia.

plural of USP unit