postcavae

from The Collaborative International Dictionary of English v.0.48

Postcava \Post"ca`va\, n.; pl. {Postcav[ae]} . [NL. See {Post-},
   and {Cave}, n.] (Anat.)
   The inferior vena cava. -- {Post"ca`val}, a. --B. G. Wilder.
   [1913 Webster]