the fatty secretion of the sebaceous glands.
Origin of sebum
First recorded in 1700–10, sebum is from the Latin word sēbum tallow, grease
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the oily secretion of the sebaceous glands that acts as a lubricant for the hair and skin and provides some protection against bacteria
Word Origin for sebum
C19: from New Latin, from Latin: tallow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
secretion of the sebaceous glands, 1728, from medical use of Latin sebum "sebum, suet, grease," probably related to sapo "soap" (see soap (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
The semifluid secretion of the sebaceous glands, consisting chiefly of fat, keratin, and cellular material.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
The fatty substance secreted by the sebaceous glands of mammals that protects and lubricates the skin and hair.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.