1. 
   Xanthochroism
   Xan·thoch'ro·ism noun Abnormal coloration of feathers in which yellow replaces the normal color, as in certain parrots. It is commonly due to lack of the dark pigment which with yellow forms green.
   Found op http://www.encyclo.co.uk/webster/X/1
   
   
2. 
   Xanthochroism
   • (n.) Abnormal coloration of feathers in which yellow replaces the normal color, as in certain parrots. It is commonly due to lack of the dark pigment which with yellow forms green.
   Found op http://thinkexist.com/dictionary/meaning/xanthochroism/
   
   

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