The Collaborative International Dictionary of English v.0.48:

Mordicant \Mor"di*cant\, a. [L. mordicans, p. pr. of mordicare
   to bite, fr. mordere: cf. F. mordicant.]
   Biting; acrid; as, the mordicant quality of a body. [R.]
   --Boyle.
   [1913 Webster]