| Pronunciation: | | u'sideeun
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| Matching Terms: | | ascidiaceae, ascidian tadpole, ascidiarium
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 WordNet Dictionary |
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| | Definition: | | [n] minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves |
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| | See Also: | | Ascidiaceae, class Ascidiaceae, sea squirt, tunicate, urochord, urochordate |
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| Webster's 1913 Dictionary |
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| | Definition: | | \As*cid"i*an\, n. [Gr. ? bladder, pouch.] (Zo["o]l.)
One of the Ascidioidea, or in a more general sense, one of
the Tunicata. Also as an adj.
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