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

Derived forms: mentums

Type of: body part, feature, lineament, plant part, plant structure

Part of: face, human face, insect, orchid, orchidaceous plant

Encyclopedia: Mentum