Definition of "sebum"
noun:
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A thick oily substance, secreted by the sebaceous glands of the skin, that consists of fat, keratin and cellular debris.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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A thick oily substance, secreted by the sebaceous glands of the skin, that consists of fat, keratin and cellular debris.
from Wiktionary, Creative Commons Attribution/Share-Alike License