An archaic term for a hook or hooked fastening, or in music, a crotchet (a quarter note).
From Old French croche, meaning 'hook,' derived from croc (hook). The word entered English through French musical terminology and medieval craft vocabulary.
The musical note called a 'crotchet' is literally named after a hook because in old musical notation, quarter notes were written with little hooked marks—the shape inspired the name!
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