diphenol
noun
di·phe·nol
| \ (ˈ)dī-ˈfen-ˌȯl
, -ˈfēn-
, -ˌōl\
, -ˈfēn-
, -ˌōl\
Medical Definition of diphenol
: a chemical compound (as pyrocatechol or resorcinol) containing two phenolic hydroxyl groups