c.1300, "curl of hair," from Anglo-Fr. crocket, northern Fr. form of Fr. crochet (see crochet). Meaning "ornamental device on a Gothic pediment" is from late 14c.
late 14c., "crocket," later "small hook" (early 15c.), from Fr. crochet "hook" (see crochet). As a surgical instrument, from 1750. Fig. use in musical notation is from mid-15c., from the shape of the notes. Meaning "whimsical fancy" is from 1570s; perhaps from the same mechanical image in crank; but other authorities link this sense to the musical notation one.
1530s, original meaning "pitchfork," from O.N.Fr. croche "shepherd's crook," var. of croc "hook" (see crochet); meaning "region where the body forks" is 1590s.