1. 
   Diradiation
   Di·ra`di·a'tion noun [ Prefix di- + radiation .] The emission and diffusion of rays of light.
   Found op http://www.encyclo.co.uk/webster/D/71
   
   
2. 
   diradiation
   The emission and diffusion of rays of light. ... Origin: Pref. Di- + radiation. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?diradiation
   
   
3. 
   Diradiation
   • (n.) The emission and diffusion of rays of light.
   Found op http://thinkexist.com/dictionary/meaning/diradiation/
   
   

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