[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
     n : a blood vessel that carries blood from the capillaries
         toward the heart; all veins except the pulmonary carry
         unaerated blood syn: vein, venous blood vessel
     also: venae pl
see also:
vein venous blood vessel venae 

Vena >> V Words
Vena, definition of term: Vena
vena_pag1.html

Vena Contracta >> V Words
Vena Contracta, definition of term: Vena Contracta
vena+contracta_pag1.html

Vena Cava >> V Words
Vena Cava, definition of term: Vena Cava
vena+cava_pag1.html

Inferior Vena C >> I Words
Inferior Vena C, definition of term: Inferior Vena C
inferior+vena+c_pag1.html

Superior Vena C >> S Words
Superior Vena C, definition of term: Superior Vena C
superior+vena+c_pag1.html