[1] : The Collaborative International Dictionary of English v.0.48

cerastes \ceras"tes\, n. l., a horned serpent, fr. gr.
   kera`sths horned, fr. ke`ras horn. zool.
   a genus of poisonous african serpents, with a horny scale
   over each eye; the horned viper.
   1913 webster

[2] : WordNet (r) 2.0

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
see also:
horned viper sand viper horned asp cerastes cornutus 

Cerastes >> C Words
Cerastes, definition of term: Cerastes
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