pericardial fluid

from The Collaborative International Dictionary of English v.0.48

Pericardiac \Per`i*car"di*ac\, Pericardial \Per`i*car"di*al\, a.
   (Anat.)
   Of or pertaining to pericardium; situated around the heart.
   [1913 Webster]

   {Pericardial fluid} (Physiol.), a serous fluid of a pale
      yellow color contained in the pericardium.
      [1913 Webster]