Sebacic (?), a. [L. sebum tallow: cf. F. sébacique.] (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]