plural of parent company

(business) A company that owns or controls one or more other companies.

plural of parent compound

An adult who cares for a child who has been placed in foster care.

plural of foster parent

plural of parent-in-law

One's spouse's parent.

Alternative form of grandparent

(physics) the nuclide whose radioactive decay product is a specific daughter nuclide

The parent (either of a separated pair) with whom a child or children do not live the majority of the time.