siphonnoun bent pipe or tube with one end lower than the other siphonnoun tubelike organ found in animals or elongated cell found in plants soda siphonnoun bottle of soda water sumpnoun completely flooded cave passage trapnoun bend, sag, or other device in a waste-pipe to prevent the escape of noxious gases trapnoun place in a water pipe, pump, etc., where air accumulates for want of an outlet |