Bible Dictionaries
Opisthobranchiata
Webster's Dictionary
(n. pl.) A division of gastropod Mollusca, in which the breathing organs are usually situated behind the heart. It includes the tectibranchs and nudibranchs.
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Bibliography Information
Webster, Noah. Entry for 'Opisthobranchiata'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/o/opisthobranchiata.html. 1828.