plural noun

Definition of Palaeechinoidea

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

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Other Words from Palaeechinoidea

palaeechinoidean \ ¦⸗⸗+ \ adjective or noun

History and Etymology for Palaeechinoidea

New Latin, from pale- + Echinoidea

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a sum of money that is sent as a payment

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