Lan"o*lin (?), n. [L. lana wool + oleum oil.] (Physiol. Chem.) A peculiar fatlike body, made up of cholesterin and certain fatty acids, found in feathers, hair, wool, and keratin tissues generally.

&fist; Under the same name, it is prepared from wool for commercial purposes, and forms an admirable basis for ointments, being readily absorbed by the skin.

Enlish
• (uncountable) A greasy yellow substance chemically akin to wax that is secreted from wooly animals, with a variety of uses from rust prevention, lubrication and water-proofing to cosmetics and skin ointments.