A short Encyclopedia Britannica (11th ed.) entry on the word 'crotchet'. It traces the word to the French croche, 'hook', and mentions its relation to the English 'crochet' for hook work. It then covers other senses: hook-like bristles of burrowing worms, the musical note, and a whim or fancy, as in 'crotchety'. It does not describe crochet technique.