groupoid

== English == === Etymology === From group +‎ -oid. === Pronunciation === IPA(key): /ˈɡɹuːpɔɪd/ === Noun === groupoid (plural groupoids) (algebra) A magma: a set with a total binary operation. (algebra and category theory) A set with a partial binary operation that is associative and has identities and inverses. ==== Derived terms ==== ==== Translations ==== ==== Further reading ==== groupoid on Wikipedia.Wikipedia