Hair

From DictionGloss

One of the numerous fine and generally cylindrical filaments that grow from the skin or integument of animals, esp. of most mammals, of which they form the characteristic coat; applied also to similar-looking filamentous outgrowths from the body of insects and other invertebrates. These are usually of different structures.

Hair cuticular cast - A freely movable, firm yellowish-white material ensheathing scalp hairs resulting from scalp disorders such as psoriasis or seborrhoeic dermatitis.