Perischoechinoida

plural noun

Pe·​ris·​cho·​ech·​i·​noi·​da

pə¦ris(ˌ)kōˌekəˈnȯidə

: a large order of regular Paleozoic Echinoidea

Word History

Etymology

New Latin perischo- (from Greek perischesis surrounding, from periechein, perischein to surround—from peri- + echein, schein to have, hold—+ -sis) + echin- + -oida

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