See Also: Spatangoidea(medicine)
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Spatangoidea (medicine)


spatangoidea
<zoology> 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.

Origin: NL. See Spatangus, and -oid.

Source: Websters Dictionary