ˌdī(ˌ)mərˈkaˌprȯl, -rōl noun
( -s )
Etymology: irregular from di-mercapto-propanol
: a colorless viscous oily compound CH 2 (SH)CH(SH)CH 2 OH with an offensive odor developed as an antidote to lewisite but now used in treating poisoning by compounds of arsenic and heavy metals (as mercury and gold); 2,3-di-mercapto-1-propanol — called also BAL, British anti-lewisite