mentum Meaning, Definition & Usage

  1. noun a projection like a chin formed by the sepals and base of the column in some orchids
  2. noun the protruding part of the lower jaw
    chin.
  3. noun a projection below the mouth of certain mollusks that resembles a chin

WordNet

Men"tum noun
Etymology
L., chin.
Definitions
  1. (Zoöl.) The front median plate of the labium in insects. See Labium.

Webster 1913