The Collaborative International Dictionary of English v.0.48:

Gastrovascular \Gas`tro*vas"cu*lar\, a. [Gastro- + -vascular.]
   (Zool.)
   Having the structure, or performing the functions, both of
   digestive and circulatory organs; as, the gastrovascular
   cavity of c[oe]lenterates.
   [1913 Webster]