"Designating or relating to sebaceous glands that open into hair follicles, or the anatomical unit formed by these structures", Late 19th cent.; earliest use found in The Lancet. After French pilosébacé (L. Moynac Élém. de Pathol. et de Clinique Chirurgicales (ed. 2, 1878) II. 647).[pilosebaceous etymology, pilosebaceous origin, 英语词源]