praecava

from The Collaborative International Dictionary of English v.0.48

Praecava \Pr[ae]"ca`va\, n. [NL. See {Pre-}, and 1st {Cave}.]
   (Anat.)
   The superior vena cava. -- {Pr[ae]"ca`val}, a. --B. G.
   Wilder.
   [1913 Webster]