aboral to in taxon Eumetazoa Cnidaria Asteroidea Vertebrata <vertebrates> organism subdivision oral subdivision of organism aboral subdivision of organism abactinal surface aboral side of organism A major subdivision of an organism that is the entire side of the organism aboral to the plane that divides the organism in two, perpendicular to the oral-aboral axiom. abactinal side aboral side abactinal subdivision UBERON:0008259 aboral subdivision