Medical Dictionary

Viperidae

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noun plural Vi·per·i·dae \vī-ˈper-ə-ˌdē\

Medical Definition of Viperidae

  1. :  a widely distributed family comprising heavy-bodied venomous snakes that include Old World snakes (subfamily viperinae) and the pit vipers (subfamily Crotalinae) and that are characterized by large tubular venom-conducting fangs erected by rotation of the movable premaxillae—compare crotalidae

viperid

\ˈvī-pə-ˌrid\play adjective

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feeling or affected by lethargy

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