We don't have synonyms for exoskeletal yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are exoskeleton, endoskeletal and episkeletal.
(adj) :
(engineering, of a turbine) Having rotor blades extending inwards from the inner surface of a rotating drum, rather than outwards from a central shaft.
(adj) :
(engineering, of a turbine) Having rotor blades extending inwards from the inner surface of a rotating drum, rather than outwards from a central shaft.