eurypteroidea Meaning, Definition & Usage

Eu*ryp`te*roi"de*a noun plural
Etymology
NL. See Eurypteroid.
Definitions
  1. (Paleont.) An extinct order of Merostomata, of which the genus Eurypterus is the type. They are found only in Paleozoic rocks. Written also Eurypterida.

Webster 1913