/ Dictionary / Index S sebaceous: Meaning and Definition of Find definitions for: se•ba•ceous Pronunciation: (si-bā'shus), [key] — adj. Physiol. pertaining to, of the nature of, or resembling tallow or fat; fatty; greasy. secreting a fatty substance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sebaceous (Thesaurus) sea wrack sebaceous gland Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language