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cacodylic acid

American

noun

a colorless, crystalline, deliquescent, poisonous solid, (CH3 ) 2 AsOOH, used chiefly in the manufacture of dyes and as an herbicide.

Etymology

Origin of cacodylic acid

First recorded in 1840–50

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.