'Eurypterus' definitions:

Definition of 'Eurypterus'

From: GCIDE

Eurypterus \Eu*ryp"te*rus\, n. [NL., fr. Gr. ? broad + ? a wing.] (Paleon.) A genus of extinct Merostomata, found in Silurian rocks. Some of the species are more than three feet long. [1913 Webster]