Lexic.us

Definition of Spatangoidea

1. 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.

Medical Definition of Spatangoidea

1. 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 (01 Mar 1998)

Lexicographical Neighbors of Spatangoidea

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