complementary

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complementary

  • /ˌkɒmplɪˈmɛnt(ə)ɹi/ UK
  • /ˌkɑmplɪˈmɛnt(ə)ɹi/ Atlantic Canada, US
  • /ˌkɒmplɪˈmɛnt(ə)ɹi/ Canada

Sounds like complimentary · Rhymes with -ɛntəɹi, -ɛntɹi

Where it comes from

From complement + -ary. Piecewise doublet of complimentary.

adjective more complementary · most complementary

  1. Acting as a complement; making up a whole with something else. I'll provide you with some complementary notes to help you study.
  2. Of the specific pairings of the bases in DNA and RNA.
  3. 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.)

noun complementaries

  1. A complementary colour.
  2. obsolete One skilled in compliments. the hands of the most skilful and cunning complementaries alive
  3. An angle which adds with another to equal ninety degrees.

Thesaurus

Closest in meaning: complemental, reciprocal, interchangeable, antonymous, inessential, unessential, completing, complementarity, complement, integrated, interrelated, interdependent, adjunct, supplemental, supplementation, mutually

Translations

Every language

noun a complementary (i.e. colour or angle)

DeutschKomplementär, Ergänzung

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Cite this
MLA

"complementary." Wiktionary, via Micwyn, micwyn.com/word/complementary. Accessed 6 Nov. 2026.

APA

complementary. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/complementary

Chicago

"complementary." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/complementary.

BibTeX
@misc{complementary_2026,
  title = {complementary},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/complementary},
  urldate = {2026-11-06}
}