heteromorphosis
noun
het·ero·mor·pho·sis
| \ -ˈmȯr-fə-səs also -mȯr-ˈfō-\
plural heteromorphoses\ -ˌsēz 
\
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Medical Definition of heteromorphosis
1
: the production in an organism of an abnormal or misplaced part especially in place of one that has been lost (as the regeneration of a tail in place of a head)
2a
: the production of a malformed or malposed tissue or organ
b
: the formation of tissue of a different type from that from which it is derived