'Dandruff' definitions:

Definition of 'dandruff'

From: WordNet
noun
A condition in which white scales of dead skin are shed by the scalp
noun
Loose scales shed from the scalp; "I could see the dandruff on her shoulders"

Definition of 'Dandruff'

From: GCIDE
  • Dandruff \Dandruff\ (d[a^]n"dr[u^]f), n. [Prob. from W. toncrust, peel, skin + AS. dr[=o]f dirty, draffy, or W. drwg bad: cf. AS. tan a letter, an eruption. [root]240.] A scurf which forms on the head, and comes off in small scales or particles. [Written also dandriff.] [1913 Webster]