[1] : The Collaborative International Dictionary of English v.0.48

vena \ve"na\, n.; pl. venae. l. see vein.
   a vein.
   1913 webster

   vena cava; pl. venae cavae. l., literally, hollow vein.
      anat. any one of the great systemic veins connected
      directly with the heart.

   vena contracta. l., literally, contracted vein.
      hydraulics the contracted portion of a liquid jet at and
      near the orifice from which it issues.

   vena portae; pl. venae portae. l., literally, vein of
      the entrance. anat. the portal vein of the liver. see
      under portal.
      1913 webster
see also:
venae vein vena cava venae cavae vena contracta vena portae 
venae portae portal 

[2] : WordNet (r) 2.0

vena cava
     n : either of two large veins that return oxygen-depleted blood
         to the right atrium of the heart

Inferior Vena C >> I Words
Inferior Vena C, definition of term: Inferior Vena C
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