ˈmentəm noun
( plural men·ta -tə)
Etymology: in sense 1, from Latin; in other senses, New Latin, from Latin — more at mental
1. : chin
2. : a projection like a chin in some orchid flowers formed by the sepals and the base of the column
3. : a median plate of the labium of an insect — see labial palpus
4. : a projection below the mouth of certain mollusks