cerastes

from WordNet (r) 3.0 (2006)

cerastes
    n 1: highly venomous viper of northern Africa and southwestern
         Asia having a horny spine above each eye [syn: {horned
         viper}, {cerastes}, {sand viper}, {horned asp}, {Cerastes
         cornutus}]

from The Collaborative International Dictionary of English v.0.48

Cerastes \Ce*ras"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]

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