a prop or support.-that by which a lever is sustained, or about which it turns in lifting or moving a body.-an accessory organ such as a tendril, stipule, spine, and the like.-the horny inferior surface of the lingua of certain insects.-one of the small, spiniform scales found on the front edge of the dorsal and caudal fins of many ganoid fishes.-the connective tissue supporting the framework of the retina of the eye.