1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Opacous  \O*pa"cous\,  a.  [L.  opacus.  See  {Opaque}.] 
  Opaque.  [R.]  --Milton.  --  {O*pa"cous*ness},  n.  [R.] 

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