atrial

from WordNet (r) 3.0 (2006)
atrial
    adj 1: of or relating to a cavity or chamber in the body
           (especially one of the upper chambers of the heart)
    
from The Collaborative International Dictionary of English v.0.48
Atrial \A"tri*al\, a.
   Of or pertaining to an atrium.
   [1913 Webster]
    

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