| eurypteroid | <paleontology> Like, or pertaining to, the genus Euryperus. Origin: Eurypterus. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| eurypteroidea | <paleontology> An extinct order of Merostomata, of which the genus Eurypterus is the type. They are found only in Paleozoic rocks. Alternative forms: Eurypterida. Origin: NL. See Eurypteroid. Source: Websters Dictionary (01 Mar 1998) |