1) Superior vena cava 2) Vena cava 
Synonym for superior vena cava ... <anatomy> The major venous channel draining the thorax and head which ends in the right atrium. ... (19 Jan 1998) ... 
(pre-ka´vә) superior vena cava. adj., preca´val., adj.
Type: Term Pronunciation: prē-kā′vă Synonyms: vena cava, superior
(in squids) either of a pair of veins that pass through the kidney to the branchial heart.