biliary calculus

from The Collaborative International Dictionary of English v.0.48

Biliary \Bil"ia*ry\ (b[i^]l"y[.a]*r[y^]; 106), a. [L. bilis
   bile: cf. F. biliaire.] (Physiol.)
   Relating or belonging to bile; conveying bile; as, biliary
   acids; biliary ducts.
   [1913 Webster]

   {Biliary calculus} (Med.), a gallstone, or a concretion
      formed in the gall bladder or its duct.
      [1913 Webster]