labrum

la.brum

n.（名词）
【复数】 la.bra[-br…]
A lip or liplike structure, such as the one forming the roof of the mouth in insects.
唇或唇状结构，例如昆虫的唇部分
The outer margin of the opening of a gastropod shell.
孔缘：腹足纲的软体动物的贝壳的壳口外缘

来源：
Latin [lip] * see leb-
拉丁语 [唇] *参见 leb-