The Collaborative International Dictionary of English v.0.48:

Morphon \Mor"phon\, n. [Gr. ?, p. pr. of ? to form.] (Biol.)
   A morphological individual, characterized by definiteness of
   form, in distinction from bion, a physiological individual.
   See Tectology. --Haeckel.
   [1913 Webster]

   Note: Of morphons there are six orders or categories: 1.
         Plastids or elementary organisms. 2. Organs,
         homoplastic or heteroplastic. 3. Antimeres (opposite
         or symmetrical or homotypic parts). 4. Metameres
         (successive or homodynamous parts). 5. Personae
         (shoots or buds of plants, individuals in the narrowest
         sense among the higher animals). 6. Corms (stocks or
         colonies). For orders 2, 3, and 4 the term idorgan has
         been recently substituted. See Idorgan.
         [1913 Webster]