Source : Webster's Revised Unabridged Dictionary (1913)

Allotropic \Al`lo*trop"ic\ ([a^]l`l[-o]*tr[o^]p"[i^]k),
Allotropical \Al`lo*trop"ic*al\ (-[i^]k*al), a. [Cf. F.
   allotropique.]
   Of or pertaining to allotropism. -- {Al`lo*trop"ic*al*ly},
   adv.

   {Allotropic state}, the several conditions which occur in a
      case of allotropism.