from the GNU version of the Collaborative International Dictionary of English
- A harmless North American snake of the genus Heterodon, esp. Heterodon platyrhynos; -- called also puffing adder, blowing adder, and sand viper.
from The Century Dictionary and Cyclopedia
- n. A snake of the genus Heterodon, which flattens the head when about to strike. It is not venomous. Also called flathead or flat-headed adder, blowing-viper, etc. See Heterodon.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. harmless North American snake with upturned nose; may spread its head and neck or play dead when disturbed
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