(British spelling, colour science) Either of two colours which, when mixed, produce a white or grey.

(mathematics) The general solution of a homogenous linear differential equation.

Any of several therapies that combine conventional medical practices with those of alternative medicine such as acupuncture or homeopathy.

The doctrine that genders in a society should have complementary roles.

Someone who believes that men and women are equal in status but can have different and complementary roles, especially in marriage.

The state or characteristic of being complementary.

Obsolete spelling of complimental

plural of complementary function

plural of complementarian

(semantics) A term whose meaning is the complement of another term, in an either-or fashion, such as mortal in relation to immortal.