1. 
   Pentacid
   Pen·tac'id adjective [ Pent a- + acid .] (Chemistry) Capable of neutralizing, or combining with, five molecules of a monobasic acid; having five hydrogen atoms capable of substitution by acid residues; -- said of certain complex base...
   Found op http://www.encyclo.co.uk/webster/P/48
   
   
2. 
   pentacid
   <chemistry> Capable of neutralising, or combining with, five molecules of a monobasic acid; having five hydrogen atoms capable of substitution by acid residues; said of certain complex bases. ... Origin: Penta- + acid. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?pentacid
   
   
3. 
   Pentacid
   • (a.) Capable of neutralizing, or combining with, five molecules of a monobasic acid; having five hydrogen atoms capable of substitution by acid residues; -- said of certain complex bases.
   Found op http://thinkexist.com/dictionary/meaning/pentacid/
   
   

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