pit viper
US /ˈpɪt ˌvaɪ.pər/
UK /ˈpɪt ˌvaɪ.pər/

1.
víbora de foseta
a venomous snake of the family Viperidae, characterized by a heat-sensing pit organ located between the eye and the nostril on both sides of the head
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The scientist carefully studied the behavior of the pit viper.
El científico estudió cuidadosamente el comportamiento de la víbora de foseta.
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Many species of pit vipers are found in the Americas.
Muchas especies de víboras de foseta se encuentran en las Américas.