1. 
   Prototherian
   This category is for people who have held the office of Chief of Staff of the United States Air Force. ...
   Found op http://en.wikipedia.org/wiki/Prototherian
   
   
2. 
   prototherian
   [n] - primitive oviparous mammals found only in Australia Tasmania and New Guinea
   Found op http://www.webdictionary.co.uk/definition.php?query=prototherian
   
   
3. 
   prototherian
   noun primitive oviparous mammals found only in Australia and Tasmania and New Guinea
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=prototherian
   
   
4. 
   prototherian
   1) Mammal
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/prototherian/1
   
   

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