1. The sea-hedgehog, a term applied to radiate animals, having nearly the form of a sphere, flattened on the lower side, and covered with a firm shell, set with movable spines; a prickly head or top of a plant; an echinated pericarp; an ornament, called "the egg and tongue," or "the egg and anchor" ornament, that often occurs in classical architecture, carved on the ovolo.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• wchinus,
• schinus,
• dchinus,
• rchinus,
• 4chinus,
• 3chinus,
• exhinus,
• evhinus,
• efhinus,
• edhinus,
• echinusw,
• echiinus,
• echinnus,
• ekhinus,
• echynus,
• echmnus,
• echeinus,
• echinous,
• echineus,
• echinnous

• echinacea,
• echoing.

The adjective form of the word "echinus" is "echinoid".

The plural of the "echinus" can be the "echini".

The singular of the "echinus" can be the "echinus".