Zool. the transformation of one part into another during regeneration, as in the growth of an antennule from the stump of an eye in some crustaceans
See morphallaxis in American Heritage Dictionary 4
(môrˌfə-lăkˈsĭs)
nounpl.mor·phal·lax·es(-lăkˈsēz)
The regeneration of a body part by means of structural or cellular reorganization with only limited production of new cells, observed primarily in invertebrate organisms, such as certain lobsters.