1) Class 2) Class echinoidea
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https://www.crosswordclues.com/clue/echinoidea
• (n. pl.) 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.
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http://thinkexist.com/dictionary/meaning/echinoidea/
<zoology> 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. ... Alternative forms: Echinidea, and Echinoida. ... Origin: NL. See Echinus, and -oid. ... Source: Websters Di...
Found on
http://www.encyclo.co.uk/local/20973
Ech`i·noi'de·a noun plural [ New Latin See
Echinus , and
-oid .]
(Zoology) The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. S...
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http://www.encyclo.co.uk/webster/E/6
The echinoidea are a class of Phylum echinodermata. They are the sea urchins. The body is typically globular. The skeletal plates fit closely together to form a rigid 'test'. Spines are present.
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http://www.probertencyclopaedia.com/browse/BE.HTM
[
n] - sea urchins and sand dollars
Found on
http://www.webdictionary.co.uk/definition.php?query=Echinoidea
class Echinoidea noun sea urchins and sand dollars
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.
