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1 definition found

From: Webster's Revised Unabridged Dictionary (1913)

 Si·pho·no·bran·chi·a·ta n. pl.  Zool. A tribe of gastropods having the mantle border, on one or both sides, prolonged in the form of a spout through which water enters the gill cavity. The shell itself is not always siphonostomatous in this group.
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