counit

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noun

In an adjunction, a natural transformation from the composition of the left adjoint functor with the right adjoint functor to the identity functor of the domain of the right adjoint functor.

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Meanings

nouncounit (plural counits)

plural counits

  1. mathematicsIn an adjunction, a natural transformation from the composition of the left adjoint functor with the right adjoint functor to the identity functor of the domain of the right adjoint functor.

Origin

From co- + unit.

Full word history & related roots →

Rhymes & wordplay

Anagrams

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Cite this entry
APA

counit. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/counit

MLA

“counit.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/counit. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “counit,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/counit.

Source: counit on Wiktionary, CC BY-SA 4.0.