1. 
   fetalization
   (fe″tәl-ĭ-za´shәn) retention in the adult of structures or other characteristics that at an earlier stage of evolution were only infantile and were lost as the organism matured.
   Found op http://www.encyclo.co.uk/local/21001
   
   
2. 
   fetalization
   fetalism, fetalization The retention, into adult life, of bodily characters which at some earlier stage of evolutionary history were actually only infantile and were rapidly lost as the organism attained maturity.
   Found op http://www.wordinfo.info/words/index/info/view_unit/817/
   
   

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