A cerastes is called a horned viper.
any of a genus (Cerastes) of poisonous African snakes, esp. a viper (C. cornutus) with a hornlike spine above each eye; horned viper
Origin of cerastesModern Latin ; from Classical Latin ; from Classical Greek kerastēs, horned (serpent) ; from keras, horn
Either of two venomous snakes of the genus Cerastes that have a hornlike projection over each eye, including the horned viper.
Origin of cerastesMiddle English, from Latin cerastēs, from Greek kerastēs, horned serpent, from keras, horn; see ker-1 in Indo-European roots.