Mentum
01
下巴, 下巴的突出部分
the protruding part of the lower jaw
02
mentum, 某些软体动物口部下方的突出部分，类似于下巴
a projection below the mouth of certain mollusks that resembles a chin
03
颏, 某些兰花中由萼片和蕊柱基部形成的类似下巴的突起
a projection like a chin formed by the sepals and base of the column in some orchids
