crotchet

nouns

a sharp curve or crook; a shape resembling a hook

crotchet, hook

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

crotchet, quarter note

a strange attitude or habit

crotchet, oddity, queerness, quirk, quirkiness

is derived from

a small tool or hooklike implement

crotchet

is a type of (narrower)

a curved or bent implement for suspending or pulling something