mentum

The chin; the anterior and inferior part of the mandible or under jawbone of a mammal, with or without associated soft parts.

In entomology, the median or central and usually principal part of the labium.

In botany, a projection in front of the flower in some orchids, caused by the extension of the foot of the column

The front median plate of the labium in insects. See labium.

The chin.

A chin-like projection below the mouth of certain mollusks.

a projection like a chin formed by the sepals and base of the column in some orchids

the protruding part of the lower jaw

a projection below the mouth of certain mollusks that resembles a chin