unit

Definition

noun

a single part of a larger whole
a part of a hospital that has a specialised function

Example a burns unit
a named and agreed standard amount used for measuring something

Example A gram is an SI unit of weight.
a quantity of a drug, enzyme, hormone or of blood, taken as a standard for measurement and producing a given effect

Examples three units of blood • a unit of insulin
a machine or device

Example a waste-disposal unit

"…the blood loss caused his haemoglobin to drop dangerously low, necessitating two units of RBCs and one unit of fresh frozen plasma"[RN Magazine]