furca
/ˈfɜːkə/noun
(pl. furcae /-siː/)
1- Zoology a forked appendage or projection in an arthropod, in particular【动】节肢动物的叉状附肢（或叉突）, 尤指：
1.1
- an ingrowth of the thorax of many insects（许多昆虫的）胸腔向内生长的内骨骼突。
1.2
- the furcula of a springtail跳虫的弹器。
派生词
furcal
adjective词源
early 17th cent.: from Latin, literally 'fork'.