late 14c., from Latin sipho (genitive siphonis) "a siphon," from Greek siphon "pipe, tube for drawing wine from a cask," of unknown origin. Related: Siphonal.
1859, from siphon (n.). Figurative sense of "to draw off, divert" is recorded from 1940. Related: Siphoned; siphoning.
siphon si·phon (sī'fən)
A tube bent into an inverted U shape of unequal lengths, used to remove fluid by means of atmospheric pressure from a cavity or reservoir at one end of the tube over a barrier and out the other end. v. si·phoned, si·phon·ing, si·phons
To draw off or convey through a siphon.
To pass through a siphon.