Mental /(?)/

Men·tal

Mental

a.
  1. Of or pertaining to the chin; genian; as, the mental nerve; the mental region. (Anat.)

Mental

n.
  1. A plate or scale covering the mentum or chin of a fish or reptile. (Zool.)

Mental

a.
  1. Of or pertaining to the mind; intellectual; as, mental faculties; mental operations, conditions, or exercise.
    What a mental power This eye shoots forth!

Phrases & Compounds
Mental alienation
insanity.
Mental arithmetic
the art or practice of solving arithmetical problems by mental processes, unassisted by written figures.