Fulcrum

·noun A prop or support.

II. Fulcrum ·noun The horny inferior surface of the lingua of certain insects.

III. Fulcrum ·noun An accessory organ such as a tendril, stipule, spine, and the like.

IV. Fulcrum ·noun The connective tissue supporting the framework of the retina of the eye.

V. Fulcrum ·noun That by which a lever is sustained, or about which it turns in lifting or moving a body.

VI. Fulcrum ·noun One of the small, spiniform scales found on the front edge of the dorsal and caudal fins of many ganoid fishes.