1. 
   Cawk
   Cawk (kak) noun [ Prov. English cauk limestone. A doublet of chalk .] (Min.) An opaque, compact variety of barite, or heavy spar. [ Also written cauk .]
   Found op http://www.encyclo.co.uk/webster/C/41
   
   
2. 
   Cawk
   • (n.) An opaque, compact variety of barite, or heavy spar.
   Found op http://thinkexist.com/dictionary/meaning/cawk/
   
   
3. 
   Cawk
   Cawk is an opaque, compact variety of barite, or heavy spar.
   Found op http://www.probertencyclopaedia.com/browse/HC.HTM
   
   

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