1. Relating to or situated behind the posterior vena cava (a major vein in vertebrates).
Usage: anatomy; zoology; technical

Examples

• The postcaval region of the fish contains important lymphoid tissues.
• Postcaval lymph nodes are examined during anatomical dissection.
• The postcaval vein drains blood from the posterior body region.
• In comparative anatomy, postcaval structures vary significantly among vertebrate species.