Sēa'-ûr'chin, n.
n. (Zoöl.) A radiate animal of the class of echinoderms, having a firm shell, and covered with spines; the echinus. When stripped of the spines, it is often called sea-egg.
n. (Zoöl.) A radiate animal of the class of echinoderms, having a firm shell, and covered with spines; the echinus. When stripped of the spines, it is often called sea-egg.