E-chĭ'nus, n.

(e-kī'nus), n.; pl. E-CHĪ'NĪ. [Lat. echinus, from Gr. ἐχῖ-νος, hedgehog.]

1. A hedgehog.
2. (Zoöl.) A genus of Echinoderms; sea-urchin; sea hedgehog.
3. (Bot.) A prickly head or top of a plant; an echinated pericarp.
4. (Arch.) A form of molding, being the same as the ovolo, or quarter round, but properly so called only when carved with eggs and anchors.

Sea Urchin (Echinus esculentus). Gwill.