The Collaborative International Dictionary of English v.0.48:

Ipomoeic \Ip`o*m[oe]"ic\ ([i^]p`[-o]*m[=e]"[i^]k), a. (Chem.)
   Pertaining to, or designating, an acid obtained by the
   oxidation of convolvulin (obtained from jalap, the tubers of
   Ipom[oe]a purga), and identical in most of its properties
   with sebacic acid.
   [1913 Webster]