Betulin

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Betulin \Bet"u*lin\, n. [L. betula birch tree.] (Chem.)
     a term originally applied to a substance obtained as a resin
     or tar by extraction from the outer bark of the common
     European white birch ({Betula alba}); now referring to the
     chemical compound ({C30H50O2}) having a
     cyclopentanophenanthrene ring system, which is the main


     constituent of that extract, and which may be obtained
     crystalline; -- called also {birch camphor}. --Watts.
     [1913 Webster +PJC]