(zootomy) A plate or scale covering the mentum or chin of a fish or reptile.

An adjective "mental" refers to anything related to the mind, including emotional and intellectual responses, intellectual activity, experiences in the mind, and the study of the mind.

Of or pertaining to psychiatric disorders, intended for the care or treatment of those affected by psychiatric disorders, and colloquially used to describe someone who is mentally disordered or insane.

(colloquial, UK, Ireland, Australia, New Zealand, comparable) Enjoyable or fun, especially in a frenetic way.

Of or relating to telepathic or mind-reading powers.

(anatomy, relational) Of or relating to the chin or median part of the lower jaw, genial.

(biology, relational) Of or relating to the chinlike or liplike structure.