mercapturic acid
noun
mer·cap·tu·ric acid
| \ ˌmər-ˌkap-ˈt(y)u̇r-ik-
\
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Medical Definition of mercapturic acid
: an acid C5H8O3S−R formed from cysteine and an aromatic compound in the body and usually excreted in the urine (as in the form of a glucuronide)