/ Dictionary / Index L liposome: Meaning and Definition of Find definitions for: lip•o•some Pronunciation: (lip'u-sōm", lī'pu-), [key] — n. a microscopic artificial sac composed of fatty substances and used in experimental research of the cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: liposome (Thesaurus) lipoprotein liposuction Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language