mentum

The entomologist pointed out the mentum of the insect under the microscope.

昆虫学家在显微镜下指出了昆虫的颏。

In some orchids, the mentum is formed by the fusion of sepals and the column base.

在一些兰花中，颏由萼片和蕊柱基部融合而成。

The mollusk's mentum helps it sense the surrounding environment.

软体动物的颏帮助它感知周围环境。