coelenteron

coelenteron (plural coelenterons or coelentera)

1. The body cavity of a coelenterate.
   • 1999 February 5, I. Fagoonee et al., “The Dynamics of Zooxanthellae Populations: A Long-Term Study in the Field”, in Science‎^[1], volume 283, number 5403, →DOI, pages 843–845:

     Because dissolved oxygen in the water column is continuous with water in the coelenteron, it may lead to increased oxygen concentration within the coral.