The Collaborative International Dictionary of English v.0.48:

Sebacic \Se*bac"ic\, a. [L. sebum tallow: cf. F. s['e]bacique.]
   (Chem.)
   Of or pertaining to fat; derived from, or resembling, fat;
   specifically, designating an acid (formerly called also
   sebic, and pyroleic, acid), obtained by the distillation
   or saponification of certain oils (as castor oil) as a white
   crystalline substance.
   [1913 Webster]