a solution consisting of phenol crystals, glycerol, lactic acid, and distilled water to which cotton blue or crystal violet is added; used as a stain in mycology.
lac·to·phe·nol cot·ton blue stain
(lak'tō-fē'nol kot'ŏn blū stān) A solution consisting of phenol crystals, glycerol, lactic acid, and distilled water to which cotton blue or crystal violet is added; used as a stain in study of fungi.