ECHINOIDEA
Echinoidea, class Echinoidea
(noun) sea urchins and sand dollars
Source: WordNet® 3.1
Ech`i*noi"de*a, n. pl. Etym: [NL. See Echinus, and -oid.] (Zoöl.)
Definition: 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.]
Source: Webster’s Unabridged Dictionary 1913 Edition
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12 January 2025
HABIT
(noun) (psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition; “owls have nocturnal habits”; “she had a habit twirling the ends of her hair”; “long use had hardened him to it”
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