Defn: Of or pertaining to the Echinoidea.
— n.
Defn: One of the Echinoidea.
ECHINOIDEA
Ech`i*noi"de*a, n. pl. Etym: [NL. See Echinus, and -oid.] (Zoöl.)
Defn: 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.]
ECHINOZOA
E*chi`no*zo"a, n. pl. Etym: [NL., fr. Gr. (Zoöl.)
Defn: The Echinodermata.
ECHINULATE
E*chin"u*late, a. (Bot. & Zoöl.)
Defn: Set with small spines or prickles.
ECHINUS
E*chi"nus, n.; pl. Echini. Etym: [L., a hedgehog, sea urchin, Gr.
1. (Zoöl.)