sebum

Definitions of sebum
  1. noun
    the oily secretion of the sebaceous glands; with perspiration it moistens and protects the skin
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    types:
    smegma
    a white secretion of the sebaceous glands of the foreskin
    type of:
    secretion
    a functionally specialized substance (especially one that is not a waste) released from a gland or cell
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