Bible Dictionaries
Siphonobranchiata

Webster's Dictionary

(n. pl.) 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.

Bibliography Information
Webster, Noah. Entry for 'Siphonobranchiata'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/siphonobranchiata.html. 1828.