1. 
   Implacentalia
   Im`pla·cen·ta'li·a noun plural [ New Latin See In- not, and Placental .] (Zoology) A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed.
   Found op http://www.encyclo.co.uk/webster/I/20
   
   
2. 
   implacentalia
   <zoology> A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed. ... Origin: NL. See In- not, and Placental. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?implacentalia
   
   
3. 
   Implacentalia
   • (n. pl.) A primary division of the Mammalia, including the monotremes and marsupials, in which no placenta is formed.
   Found op http://thinkexist.com/dictionary/meaning/implacentalia/
   
   

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