are substances composed of triglycerides, derived from plants. Nominally, oils are liquid at ambient temperature, and fats are solid, but this is an imprecise definition, as ambient temperatures vary, and typically there are "melting ranges" rather than "melting points". A dense brittle fat is a wax.

Triglyceride vegetable fats and oils include not only edible, but also inedible vegetable fats and oils such as linseed oil, tung oil, and castor oil, used in lubricants, paints, cosmetics, pharmaceuticals, and other industrial purposes. Although thought of as esters of glycerin and a varying blend of fatty acids, in fact these oils contain free fatty acids and diglycerides as well.