unit

An individual, group, structure, or other entity regarded as an elementary structural or functional constituent of a whole.

A group regarded as a distinct entity within a larger group.

A mechanical part or module.

An entire apparatus or the equipment that performs a specific function.

A precisely specified quantity in terms of which the magnitudes of other quantities of the same kind can be stated.

The quantity of a vaccine, serum, drug, or other agent necessary to produce a specific effect.

A fixed amount of scholastic study used as a basis for calculating academic credits, usually measured in hours of classroom instruction or laboratory work.

A section of an academic course focusing on a selected theme.