COMPLEMENTARY
complemental, complementary, completing
(adjective) acting as or providing a complement (something that completes the whole)
complementary
(adjective) of words or propositions so related that each is the negation of the other; āāmaleā and āfemaleā are complementary termsā
Source: WordNet® 3.1
Etymology
Adjective
complementary (comparative more complementary, superlative most complementary)
Acting as a complement; making up a whole with something else.
(genetics) Of the specific pairings of the bases in DNA and RNA.
(physics) Pertaining to pairs of properties in quantum mechanics that are inversely related to each other, such as speed and position, or energy and time. (See also Heisenberg uncertainty principle.)
Usage notes
• Complementary and complimentary are frequently confused and misused in place of one another.
Noun
complementary (plural complementaries)
A complementary colour.
(obsolete) One skilled in compliments.
An angle which adds with another to equal 90 degrees.
Source: Wiktionary
Com`ple*men"ta"ry, a.
Definition: Serving to fill out or to complete; as, complementary numbers.
Complementary colors. See under Color.
– Complementary angles (Math.), two angles whose sum is 90Ā°.
Com`ple*men"ta*ry, n. Etym: [See Complimentary.]
Definition: One skilled in compliments. [Obs.] B. Jonson.
Source: Webster’s Unabridged Dictionary 1913 Edition