bearer of
has characteristic
connected anatomical structure
Note that the definition does not say 'generated exclusively by the co-ordinated expression of the organism's own genome', so this is still valid for cases where normal morphogenesis requires the actions of a facultative symbiont, or some looser dependency such as the a requirement for the presence of gut flora for normal gut development.
CARO:0000003
Material anatomical entity that is a single connected structure with inherent 3D shape generated by coordinated expression of the organism's own genome.
material anatomical entity
3-D shape
maximally connected