adder stone

noun

Definition of adder stone 

: a precious stone formerly believed to be efficacious in drawing out poison especially : a highly absorbent aluminous gem

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First Known Use of adder stone

1872, in the meaning defined above

History and Etymology for adder stone

so called from the belief that it is formed by adders and is efficacious against snakebite

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The first known use of adder stone was in 1872

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