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ascidian
as·cid·i·an [ ə síddee ən ] (plural as·cid·i·ans or as·cid·i·an)


noun 
Definition:
 
marine biology  ( technical )
Same as  sea squirt
[Mid-19th century. < modern Latin Ascidia< Greek askidion "little wineskin" < askos "wineskin, leather bag"]
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