Liddell-Scott-Jones

ὑδραγωγός (hudragōgos) an aqueduct ^G:N-M

ὑδραγωγός-ός, όν,

bringing water, σείριος [Refs 1st c.AD+] purgatives producing watery motions, [Refs 2nd c.AD+]

__II substantive ὑ., ὁ, water-carrier, [Refs 2nd c.AD+], where aquarius).
__II.2 maker or manager of aqueducts, [Refs 1st c.AD+]; digger of a channel, [Refs 4th c.AD+]
__II.2.b aqueduct or irrigation channel, with or without irrigation-machinery, [LXX+3rd c.BC+]; ὑ. δαψιλής a copious watercourse, 1[Refs]
__II.3 one who drinks much water, dropsical person, [Refs 5th c.BC+]
__II.4 a plant, ={νυμφαία}, [Refs 4th c.AD+]

_{LSJ Scripture Refs: LXX.2Kgs.18.17}