The Collaborative International Dictionary of English v.0.48:

Paraconic \Par`a*con"ic\, a. [Pref. para- + aconitic.] (Chem.)
   Pertaining to, or designating, an organic acid obtained as a
   deliquescent white crystalline substance, and isomeric with
   itaconic, citraconic, and mesaconic acids.
   [1913 Webster]