fulcrum

fulcrum is defined in Webster's Unabridged Dictionary (1913) with 4 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Mech.) That by which a lever is sustained, or about which it turns in lifting or moving a body.
  2. 2.(Bot.) An accessory organ such as a tendril, stipule, spine, and the like. [R.] Gray.
  3. 3.(Zoöl.) (a) The horny inferior surface of the lingua of certain insects. (b) One of the small, spiniform scales found on the front edge of the dorsal and caudal fins of many ganoid fishes.
  4. 4.(Anat.) The connective tissue supporting the framework of the retina of the eye.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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