dandruff /ˈdandrʌf 
/ ▸ noun [mass noun] small pieces of dead skin in a person's hair: there was a certain amount of dandruff on the shirt.
– ORIGIN mid 16th century: the first element is unknown; the second ( -ruff) is perhaps related to Middle English rove ‘quality of being scurfy’.
EnglishOxford Dictionary of English
