parapodium
/ˌpærəˈpəʊdɪəm/noun
(pl. parapodia /-dɪə/)
1- Zoology (in a polychaete worm) each of a number of paired muscular bristle-bearing appendages used in locomotion, sensation, or respiration【动】（多毛类的）疣足。
1.1
- (in a sea slug or other mollusc) a lateral extension of the foot used as an undulating fin for swimming（海参或其他软体动物的）侧足。
派生词
parapodial
adjective词源
late 19th cent.: modern Latin, from Greek para- 'subsidiary' + pous, pod- 'foot'.