Blanching of skin or mucous membranes, after application of 3-5% acetic acid solution, a sign of increased cellular protein and increased nuclear density; used particularly on genital skin and mucous membranes, including the uterine cervix, to identify zones of squamous cell change for biopsy and condyloma acuminatum for treatment. SYN: visual inspection with acetic acid. [acetic acid + whitening]
