betulin
Bet"u*lin, n. Etym: [L. betula birch tree.] (Chem.) Defn: A substance of a resinous nature, obtained from the outer bark of the common European birch (Betula alba), or from the tar prepared therefrom; -- called also birch camphor. Watts.
Bet"u*lin, n. Etym: [L. betula birch tree.] (Chem.) Defn: A substance of a resinous nature, obtained from the outer bark of the common European birch (Betula alba), or from the tar prepared therefrom; -- called also birch camphor. Watts.