labrum
/ˈleɪbrəm/noun
(pl. labra /-brə/)
- Zoology a structure corresponding to a lip, especially the upper border of the mouthparts of a crustacean or insect【动】（尤指昆虫的）上唇。
派生词
labral
adjective词源
early 18th cent.: from Latin, literally 'lip'; related to labium.