adjective Physiology.
pertaining to, of the nature of, or resembling tallow or fat; fatty; greasy.
secreting a fatty substance.

1720–30; < Neo-Latin sēbāceus. See sebum, -aceous Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
sebaceous (sɪˈbeɪʃəs)
1.  of or resembling sebum, fat, or tallow; fatty
2.  secreting fat or a greasy lubricating substance
[C18: from Late Latin sēbāceus, from sebum]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1728, from L. sebaceus, from sebum "tallow, grease," probably related to sapo "soap" (see soap).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

sebaceous se·ba·ceous (sĭ-bā'shəs)

  1. Of, resembling, or characterized by fat or sebum; fatty.

  2. Secreting or producing fat or sebum.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The other ensconces itself in the micro-habitat of the sebaceous gland, less than a millimeter away.
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