Source : Webster's Revised Unabridged Dictionary (1913)

Cerastes \Ce*ras"tes\, n. [L., a horned serpent, fr. Gr. ?
   horned, fr. ? horn.] (Zo["o]l.)
   A genus of poisonous African serpents, with a horny scale
   over each eye; the horned viper.

Source : WordNet®

cerastes
     n : highly venomous viper of northern Africa and southwestern
         Asia having a horny spine above each eye [syn: {horned
         viper}, {sand viper}, {horned asp}, {Cerastes cornutus}]