Search Result for "sebum": 
Wordnet 3.0

NOUN (1)

1. the oily secretion of the sebaceous glands; with perspiration it moistens and protects the skin; 



WordNet (r) 3.0 (2006):

sebum
    n 1: the oily secretion of the sebaceous glands; with
         perspiration it moistens and protects the skin