DANDRUFF

[dan.druff] n [prob. fr. dand- (origin unknown) + -ruff, fr. ME rove scabby condition, fr. ON hrufa scab; akin to OHG hruf scurf, Lith kraupus rough] (1545): a scurf that forms on skin esp. of the scalp and comes off in small white or grayish scales -- dan.druffy adj