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1. (n.) ascidian
any tunicate of the class Ascidiacea, having in the larval stage a notochord, a characteristic of the embryonic vertebrate.
2. (adj.) ascidian
belonging or pertaining to the class Ascidiacea.
Etymology: (1855–60; < NL Ascidi(um) a tunicate genus < Gk askídion a small bag + -an1)
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| Definition of 'ascidian' |
Princeton's WordNet |
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1. (noun) ascidian
minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves
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| Definition of 'ascidian' |
Webster Dictionary |
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1. (noun) ascidian
one of the Ascidioidea, or in a more general sense, one of the Tunicata. Also as an adj
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Definitions of ascidian 
