Adjacent Words
Echinochloa frumentaceaechinococcosis
echinococcus
Echinocystis lobata
echinoderm
echinoderm family
echinoderm genus
Echinoderma
Echinodermal
Echinodermata
echinodermatous
echinoid
Echinoida
Echinops
Echinospermum Lappula
Echinozoa
Echinulate
Echinus
Echinus esculentus
Echium
Echium vulgare
echiuroid
Echiuroidea
Echo
echo chamber
Echo organ
Full-text Search for "Echinoidea"
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Echinoidea definitions
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WordNet (r) 3.0 (2005)
n
1: sea urchins and sand dollars [syn: Echinoidea, class Echinoidea]
Webster's 1913 Dictionary
Echinoidea 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.]
