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