Medical Definition of lipid
: any of various substances that are soluble in nonpolar organic solvents (as chloroform and ether), that with proteins and carbohydrates constitute the principal structural components of living cells, and that include fats, waxes, phospholipids, cerebrosides, and related and derived compounds
Seen and Heard
What made you want to look up lipid? Please tell us where you read or heard it (including the quote, if possible).