GROUPOID

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 inverses and identities.

Source: Wiktionary

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2 April 2025

(adjective) secret or hidden; not openly practiced or engaged in or shown or avowed; “covert actions by the CIA”; “covert funding for the rebels”

Coffee Trivia

The expression “coffee break” was first attested in 1952 in glossy magazine advertisements by the Pan-American Coffee Bureau.