The Collaborative International Dictionary
Eurypteroid
Eurypteroid \Eu*ryp"ter*oid\, a. [Eurypterus + -oid.] (Paleon.) Like, or pertaining to, the genus Euryperus. [1913 Webster] ||
Wiktionary
eurypteroid
a. (context paleontology English) Like, or pertaining to, the genus ''Eurypterus''.