n The part of a violin bow (or that of other similar string instruments such as the viola, cello and contrabass) located at the end held by the player, to which the horsehair is attached
n The part of a railway switch or turnout where the running-rails cross (from the resemblance to the frog in a horse’s hoof)
n A leather or fabric loop used to attach a sword or bayonet, or its scabbard, to a waist or shoulder belt