parapodium

noun

para·​po·​di·​um ˌper-ə-ˈpō-dē-əm 

ˌpa-rə-

plural parapodia ˌper-ə-ˈpō-dē-ə 

ˌpa-rə-

1

: either of a pair of fleshy lateral processes borne by most segments of a polychaete worm

2

: a lateral expansion on each side of the foot usually forming a broad swimming organ in some gastropods

parapodial

ˌper-ə-ˈpō-dē-əl 

ˌpa-rə-

adjective

Word History

Etymology

New Latin

First Known Use

1856, in the meaning defined at sense 1