noun
harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed
• Syn: ↑puff adder, ↑sand viper
• Hypernyms: ↑colubrid snake, ↑colubrid
• Member Holonyms: ↑Heterodon, ↑genus Heterodon
Useful english dictionary. 2012.