Found 2 items, similar to Eurypterida.
English → English (WordNet) Definition: Eurypterida Eurypterida n : extinct aquatic arthropods of the Paleozoic [syn: order Eurypterida ]
English → English (gcide) Definition: Eurypterida Eurypteroidea \Eu*ryp`te*roi"de*a\, n. pl. [NL. See Eurypteroid.] (Paleont.) An extinct order of Merostomata, of which the genus Eurypterus is the type. They are found only in Paleozoic rocks. [Written also Eurypterida.] [1913 Webster] ||