Men"tal, a. [F., fr. L. mentalis, fr. mens, mentis, the mind; akin to E. mind. See Mind.] Of or pertaining to the mind; intellectual; as, mental faculties; mental operations, conditions, or exercise.

What a mental power
This eye shoots forth!

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

Men"tal (?), a. [L. mentum the chin.] (Anat.) Of or pertaining to the chin; genian; as, the mental nerve; the mental region.

Men"tal, n. (Zoöl.) A plate or scale covering the mentum or chin of a fish or reptile.