n. A bent pipe or tube with legs of unequal length, used for drawing liquid out of a vessel by causing it to rise in the tube over the rim or top.n. In zoology, a canal or conduit, without reference to size, shape, or function; generally, a tube or tubular organ through which water or other fluid passes; a siphuncle.n. [capitalized] [NL.] In conchology, a genus of gastropods. Also Sipho (Klein, 1753; Fabricius, 1822) and Sypho (Brown, 1827).n. In botany, one of the small peculiar cells surrounding the large elongated central cell in the frond of certain florideous algae. See monosiphonous, polysiphonous, Polysiphonia, pericentral.n. A siphon-bottle.To convey, as water, by means of a siphon; transmit or remove by a siphon.To pass or be conducted through a siphon.n. A tubular anal organ of the aquatic bugs of the family Nepidæ, probably respiratory in function.n. In siphonophorans, a feeding zoöid or hydranth.