ECHINOIDEA: Dictionary Entry and Meaning
| Pronunciation: | | `eku'noydeeu
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 WordNet Dictionary |
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| | Definition: | | [n] sea urchins and sand dollars |
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| | Synonyms: | | class Echinoidea |
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| | See Also: | | class, Echinodermata, Exocycloida, order Exocycloida, order Spatangoida, phylum Echinodermata, sea urchin, Spatangoida | |
| Webster's 1913 Dictionary |
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| | Definition: | | \Ech`i*noi"de*a\, n. pl. [NL. See {Echinus}, and
{-oid}.] (Zo["o]l.)
The class Echinodermata which includes the sea urchins. They
have a calcareous, usually more or less spheroidal or
disk-shaped, composed of many united plates, and covered with
movable spines. See {Spatangoid}, {Clypeastroid}. [Written
also {Echinidea}, and {Echinoida}.]
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