The Collaborative International Dictionary of English v.0.48:

Ricinolein \Ric`in*o"le*in\, n. [L. ricinus castor-oil plant +
   oleum oil.] (Chem.)
   The glycerin salt of ricinoleic acid, occuring as a
   characteristic constituent of castor oil; -- formerly called
   palmin.
   [1913 Webster]