Medical Definition of bark scorpion
: any of a genus (Centruroides) of typically tan-colored scorpions occurring from the southern U.S. to northern South America and including some that are highly venomous The Arizona bark scorpion may be small, but its sting delivers a neurotoxin that can kill or render critically ill a young child.—Tina Hesman Saey, Science News, 6 June 2009
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