Source : Webster's Revised Unabridged Dictionary (1913)

Allotrophic \Al`lo*troph"ic\, a. [Gr. ? other + trophic.]
   (a) (Physiol.) Changed or modified in nutritive power by the
       process of digestion.
   (b) (Plant Physiol.) Dependent upon other organisms for
       nutrition; heterotrophic; -- said of plants unable to
       perform photosynthesis, as all saprophytes; -- opposed to
       {autotrophic}.