sebum

noun

se·​bum ˈsē-bəm 

: fatty lubricant matter secreted by sebaceous glands of the skin

Examples of sebum in a Sentence

Recent Examples on the Web

This cleanser is a star at combating excess sebum production that might lead to below-the-neck breakouts. —Deanna Pai, Allure, 13 Dec. 2024

The former helps to destroy acne-causing bacteria and reduce sebum production, while the latter rejuvenates and soothes, making for a comprehensive three-minute treatment to calm and clarify skin. —Emily Orofino, Vogue, 12 Dec. 2024

Determining how often to wash your hair means finding a balance between preventing a buildup of sebum (an oily substance secreted by the scalp) and stripping away natural oils your hair needs.4 No hair-washing schedule works for everyone. —Heather Jones, Verywell Health, 1 Dec. 2024

The right products can help clear out sebum and impurities, reducing the appearance of pores. —Christa Joanna Lee, Allure, 3 Dec. 2024

Word History

Etymology

Latin, tallow, grease

First Known Use

circa 1860, in the meaning defined above

Medical Definition

sebum

noun

se·​bum ˈsēb-əm 

: lubricant matter that is secreted by sebaceous glands of the skin and is composed of various lipids (such as triglycerides, fatty acids, and squalene)

Androgens, such as testosterone, play a role in the development and exacerbation of acne by stimulating the production of sebum.

—Isabella Tan, Dermatology Times

… the resulting production of sebum from sebaceous glands aids in lubrication, heat insulation, … antimicrobial activity, and delivery of fat-soluble antioxidants to the skin surface.

—Dustin H. Marks, American Journal of Clinical Dermatology

see sebocyte