Nouns

(n)siphon, syphona tube running from the liquid in a vessel to a lower level outside the vessel so that gravity forces the liquid through the tube
(n)siphon, syphona tubular organ in an aquatic animal (especially in mollusks) through which water can be taken in or expelled

Verbs

(v)siphon, syphon, siphon offconvey, draw off, or empty by or as if by a siphon