# complementary
## English
### Etymology

From complement +‎ -ary. Piecewise doublet of complimentary.

### Pronunciation

* (Received Pronunciation) IPA: /ˌkɒmplɪˈmɛnt(ə)ɹi/
* Audio (Southern England):(file)
* (General American) enPR: kŏm'plĭ-mĕnʹtə-rē, -trē, IPA: /ˌkɑmplɪˈmɛnt(ə)ɹi/
* Homophone: complimentary
* Rhymes: -ɛntəɹi, -ɛntɹi
* Hyphenation: com‧ple‧men‧ta‧ry

### Adjective

complementary (comparative more complementary, superlative most complementary)
* Acting as a complement; making up a whole with something else.
    I'll provide you with some complementary notes to help you study.
    The two business partners had complementary abilities: one had excellent people skills, while the other had a head for figures.
** 1988, Andrew Radford, Transformational grammar: a first course, Cambridge, UK: Cambridge University Press, page 140:Using the terminology we introduced earlier, we might then say that black and white squares are in complementary distribution on a chessboard. By this we mean two things: firstly, black squares and white squares occupy different positions on the board: and secondly, the black and white squares complement each other in the sense that the black squares together with the white squares comprise the total set of 64 squares found on the board (i.e. there is no square on the board which is not either black or white).
* (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.

#### Derived terms

* anticomplementary
* complementarily
* complementariness
* complementarity
* enantiocomplementary
* intercomplementary
* noncomplementary
* complementariness
* complementary allophone
* complementary angle
* complementary angles
* complementary antonym
* complementary colour, color
* complementary distribution
* complementary DNA
* complementary function
* complementary good
* complementary medicine
* complementary nondeterministic polynomial
* complementary region
* complementary studies
* intercomplementary

#### Related terms

* complemental

#### Translations
### Noun

complementary (plural complementaries)
* A complementary colour.
* (obsolete) One skilled in compliments.
** 1600 (first performance), Beniamin Ionson [i.e., Ben Jonson], “Cynthias Reuels, or The Fountayne of Selfe-Loue. […]”, in The Workes of Beniamin Ionson (First Folio), London: […] Will[iam] Stansby, published 1616, →OCLC:the hands of the most skilful and cunning complementaries alive
* An angle which adds with another to equal 90 degrees.

#### Translations
### Further reading

* James A. H. Murray et al., editors (1884–1928), “Complementary, a. and sb.”, in A New English Dictionary on Historical Principles (Oxford English Dictionary), volume II (C), London: Clarendon Press, →OCLC, page 725.
* “complementary”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
* “complementary”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.