1. 
   Protosulphuret
   Pro`to·sul'phu·ret noun [ Proto- + sulphuret .] (Chemistry) A protosulphide. [ Obsolete]
   Found op http://www.encyclo.co.uk/webster/P/182
   
   
2. 
   protosulphuret
   <chemistry> A protosulphide. ... Origin: Proto- + sulphuret. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?protosulphuret
   
   
3. 
   Protosulphuret
   • (n.) A protosulphide.
   Found op http://thinkexist.com/dictionary/meaning/protosulphuret/
   
   

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