What does SI mean? Definitions for SI Here are all the possible meanings and translations of the word SI.
The sebaceous glands are microscopic exocrine glands in the skin that secrete an oily or waxy matter, called sebum, to lubricate and waterproof the skin and hair of mammals.ebaceous glands secrete the oily, waxy substance called sebum (Latin: fat, tallow) that is made of triglycerides, wax esters, squalene, and metabolites of fat-producing cells. Sebum waterproofs and lubricates the skin and hair of mammals.
salivary g's see salivary glands. sebaceous gland a type of holocrine gland of the corium that secretes an oily material (sebum) into the hair follicles. Glands: The relationship of the hair follicle, eccrine and apocrine sweat glands and sebaceous glands.