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Douglas Harper's Etymology Dictionary
puff-adder

1789 of a South African snake that is venomous; 1882 of a western U.S. snake that is not; from puff (v.) + adder.\n

Usage examples of "puff-adder".

Baringo, where one of our two remaining Askari, having unfortunately trodden on a puff-adder, died of snake-bite, in spite of all our efforts to save him.