The Collaborative International Dictionary of English v.0.48:

Nemean \Ne"me*an\ (n[=e]"m[-e]*an; 277), a. [L. Nemeus, fr.
   Nemea, Gr. Neme`h.]
   Of or pertaining to Nemea, in Argolis, where the ancient
   Greeks celebrated games, and Hercules killed a lion.
   [1913 Webster]