- belonging or pertaining to the Elasmobranchii, the subclass of cartilaginous fishes comprising the sharks and rays.
- an elasmobranch fish.
- any cartilaginous fish of the subclass Elasmobranchii (or Selachii), which includes the sharks, rays, dogfish, and skates
- of, relating to, or belonging to the Elasmobranchii
