1. 
   Heterodactylous
   Het`er·o·dac'tyl·ous adjective [ Hetero- + Greek ... a toe.] (Zoology) Having the first and second toes turned backward, as in the trogons.
   Found op http://www.encyclo.co.uk/webster/H/39
   
   
2. 
   heterodactylous
   <zoology> Having the first and second toes turned backward, as in the trogons. ... Origin: Hetero- + Gr. A toe. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?heterodactylous
   
   
3. 
   Heterodactylous
   • (a.) Having the first and second toes turned backward, as in the trogons.
   Found op http://thinkexist.com/dictionary/meaning/heterodactylous/
   
   
4. 
   heterodactylous
   heterodactyl, heterodactylous Having the toes, or one of them, irregular or abnormal, as certain families of birds.
   Found op http://www.wordinfo.info/words/index/info/view_unit/2790/2
   
   

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