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Definition of ascidian
: any of a class (Ascidiacea) of solitary or colonial sessile tunicates having an incurrent and excurrent siphon —called also sea squirt
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Origin and Etymology of ascidian
New Latin Ascidia, group comprising tunicates, from Ascidium, genus name, from Greek askidion, diminutive of askos wineskin, bladder
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See words that rhyme with ascidian Britannica.com: Encyclopedia article about ascidian
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