Fulcrum

Fulcrum, the pivot on which a lever moves.

Defiinition

• 1. A prop or support; now only spec. in Mech. the point against which a lever is placed to get purchase or upon which it turns or is supported.

• 2. (Chiefly pl.) a. Bot. Accessory organs or appendages of a plant; e.g. bracts, stipules, tendrils, etc.

b. Ichth. (pl.) The small osseous scales arranged in a row and situated on the anterior ray of the fins of many ganoid fishes.

c. Zool. The stem or median part of the incus of the mastax of certain rotifers.

d. . Ent. In Diptera, a chitinous portion of the pharynx.