1. 
   unimuscular
   <zoology> Having only one adductor muscle, and one muscular impression on each valve, as the oyster; monomyarian. ... Origin: Uni- muscular. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?unimuscular
   
   
2. 
   Unimuscular
   • (a.) Having only one adductor muscle, and one muscular impression on each valve, as the oyster; monomyarian.
   Found op http://thinkexist.com/dictionary/meaning/unimuscular/
   
   

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