English echinoidea meaning in English  •  echinoidea का अर्थ अंग्रेजी में

n. pl.

• The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See Spatangoid>, Clypeastroid>.