ECHINOID

Noun

echinoid (plural echinoids)

(zoology) Any sea urchin or sea dollar of the class Echinoidea.

Adjective

echinoid

Resembling a sea urchin.

Source: Wiktionary

E*chi"noid, a. Etym: [Echinus + -oid.] (Zoöl.)

Definition: Of or pertaining to the Echinoidea.

– n.

Definition: One of the Echinoidea.

Source: Webster’s Unabridged Dictionary 1913 Edition