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Useful english dictionary. 2012.
Eurypteroid — Eu*ryp ter*oid, a. [Eurypterus + oid.] (Paleon.) Like, or pertaining to, the genus Euryperus. [1913 Webster] || … The Collaborative International Dictionary of English
eurypteroid — eu·ryp·te·roid … English syllables
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] || … The Collaborative International Dictionary of English
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] || … The Collaborative International Dictionary of English
