| ̷ ̷ ̷ ̷+ noun plural
Usage: capitalized
Etymology: New Latin, from pale- + Echinoidea
in some classifications : a division of extinct chiefly Paleozoic sea urchins having the test usually composed of more than 20 meridional rows of plates that often overlap and jaws always present — compare euechinoidea
• palae·echinoidean | ̷ ̷ ̷ ̷+ adjective or noun