Inverted siphon
Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
(Hydraulic Engineering) a tube bent like a siphon, but having the branches turned upward; specifically (Hydraulic Engineering), a pipe for conducting water beneath a depressed place, as from one hill to another across an intervening valley, following the depression of the ground.
See also: Siphon
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.