ichthammol

noun
ich·​tham·​mol | \ ˈik-thə-ˌmȯl How to pronounce ichthammol (audio) , -ˌmōl How to pronounce ichthammol (audio) \

Medical Definition of ichthammol

: a brownish black viscous tarry liquid prepared from a distillate of bituminous schists by sulfonation followed by neutralization with ammonia and used as an antiseptic and emollient — see ichthyol