dandruff

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dandruff,

excessive flaking of skin from the scalp, apparent as dry or greasy diffuse scaling with variable itching. It is the sign of a skin disease, such as seborrhea or a fungal infection. Treatment requires the use of shampoos containing pyrithione zinc, selenium sulfide, sulfur and salicylic acid, or tar shampoo used daily until the dandruff is under control.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Dandruff

 

grayish white scaly material that is desquamated from the epidermis of the scalp. The formation of dandruff may be a normal occurrence or a symptom of such skin diseases as seborrhea.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

dandruff

[′dan·drəf]
(medicine)
Scales of dry sebum formed on the scalp in seborrhea.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

dandruff

loose scales of dry dead skin shed from the scalp
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005