имя существительное перхоть
noun Etymology: probably from dand- (origin unknown) + -ruff, from Middle English rove scabby condition, from Old Norse hrūfa scab; akin to Old High German hruf scurf, Lithuanian kraupus rough scaly white or grayish flakes of dead skin cells especially of the scalp; also the condition marked by excessive shedding of such flakes and usually accompanied by itching • dandruffy adjective