jugum
/ˈdʒuːgəm/noun
(pl. juga /-gə/)
1- chiefly Zoology a connecting ridge or projection【主动】腕锁。
1.1
- Entomology a lobe on the forewing of some moths which interlocks with the hindwing in flight【昆】翅轭。
词源
mid 19th cent.: from Latin, literally 'yoke'.