1. 
   Hyetology
   Hy`e·tol'o·gy noun [ Greek ... + rain -logy .] The science which treats of the precipitation of rain, snow, etc. -- Hy`e*to*log'ic*al adjective
   Found op http://www.encyclo.co.uk/webster/H/78
   
   
2. 
   Hyetology
   • (n.) The science which treats of the precipitation of rain, snow, etc.
   Found op http://thinkexist.com/dictionary/meaning/hyetology/
   
   

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