Definition of: lanolin

(lan′ə·lin) noun
An unctuous fatty mixture of the ethers of cholesterin with fatty acids, obtained from various keratin tissues, as the wool of sheep, valuable in pharmacy as a vehicle for substances intended to be applied to the skin: also called wool fat. Also lan′o·line (-lin, -lēn). [<L lan(a) wool + ol(eum) oil + -IN]