Read the dictionary definition of siphon. All definitions for this word.
1. a tubular organ in an aquatic animal (especially in mollusks) through which water can be taken in or expelled
2. a tube running from the liquid in a vessel to a lower level outside the vessel so that gravity forces the liquid through the tube
3. move a liquid from one container into another by means of a siphon or a siphoning action
1. siphon gas into the tank
4. convey, draw off, or empty by or as if by a siphon
