| OPH | North American green snakes |
|---|---|
| OPH | of southern and eastern United States |
| OPH | of western and central United States |
| OPH | snakes |
| OPH | limbless scaly elongate reptile |
| OPH | eel-like marine fishes |
| OPH | poisoning by snake venom |
| OPH | a genus of Ophiodontidae |
| OPH | food fish of Northern Pacific waters related to greenlings |
| OPH | fishes closely related to greenlings |
| OPH | a family of succulent ferns of order Ophioglossales |
| OPH | coextensive with the family Ophioglossaceae |