Bible Dictionaries
Spatangoidea
Webster's Dictionary
(n. pl.) An order of irregular sea urchins, usually having a more or less heart-shaped shell with four or five petal-like ambulacra above. The mouth is edentulous and situated anteriorly, on the under side.
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Bibliography Information
Webster, Noah. Entry for 'Spatangoidea'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/spatangoidea.html. 1828.