Meaning

noun a sharp curve or crook; a shape resembling a hook

noun a musical note having the time value of a quarter of a whole note

noun a strange attitude or habit

originFrom Middle English crochet, from Old French crochet (“small hook”), from croc + -et (diminutive suffix), from Old Norse krókr (“hook”). The musical note was named so because of a small hook on its stem in black notation (in modern notation this hook is on the quaver/eighth note). Doublet of crochet, crocket, and croquet.

Etymology from Wiktionary, CC BY-SA 3.0