Fulcrum /(?)/

Ful·crum

Fulcrum

n.

pl. Fulcra, Fulcrums

  1. A prop or support.
  2. That by which a lever is sustained, or about which it turns in lifting or moving a body. (Mech.)
  3. An accessory organ such as a tendril, stipule, spine, and the like. (Bot.) [R.]
  4. The horny inferior surface of the lingua of certain insects. (Zool.)
  5. The connective tissue supporting the framework of the retina of the eye. (Anat.)