\Ro*sol"ic\, a. [Rose + carbolic.] (Chem.)
Pertaining to, or designating, a complex red dyestuff (called
rosolic acid) which is analogous to rosaniline and aurin. It
is produced by oxidizing a mixture of phenol and cresol, as a
dark red amorphous mass, {C20H16O3}, which forms weak salts
with bases, and stable ones with acids. Called also {methyl
aurin}, and, formerly, {corallin}.