n.
Pronunciation: ə - ' si-d ē - ə n
Function: noun
Etymology: New Latin Ascidia, group comprising tunicates, from Ascidium, genus name, from Greek askidion, diminutive of askos wineskin, bladder
Date: 1835
: any of a class (Ascidiacea) of solitary or colonial sessile tunicates having an incurrent and excurrent siphon ― called also sea squirt