1. Large African viper that inflates its body when alarmed
   "The puff adder raised its head and hissed a warning";
   - Bitis arietans
    
2. Harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed
   "The puff adder's dramatic defensive display often startles unsuspecting hikers";
   - hognose snake, sand viper

Derived forms: puff adders

Type of: colubrid, colubrid snake, viper

Part of: Bitis, genus Bitis, genus Heterodon, Heterodon

Encyclopedia: Puff adder