noun Download 🔗Share Any of a group of organic compounds including the fats, oils, waxes, sterols, and triglycerides. Lipids are characterized by being insoluble in water, and account for most of the fat present in the human body. Examples : "Our bodies need lipids, like fats and oils, for energy and to build healthy cells. " biochemistry chemistry biology substance body food physiology medicine science compound Chat with AIVocabulary GamePractice Reading