sebum

noun Physiology.

1. the fatty secretion of the sebaceous glands.

noun

1. the oily secretion of the sebaceous glands that acts as a lubricant for the hair and skin and provides some protection against bacteria

n.secretion of the sebaceous glands, 1728, from medical use of Latin sebum “sebum, suet, grease,” probably related to sapo “soap” (see soap (n.)). n.

1. The semifluid secretion of the sebaceous glands, consisting chiefly of fat, keratin, and cellular material.

1. The fatty substance secreted by the sebaceous glands of mammals that protects and lubricates the skin and hair.