ὑδροφαντική
From LSJ
ἄλλος Ἡρακλῆς, ἄλλος αὐτός → close friendship, close friend, another Hercules—another self, another Heracles—another self
English (LSJ)
(sc. τέχνη), ἡ, the art of discovering water, Gp. 2.6.1; also ὑδροφαντικά, τά, ibid.
German (Pape)
[Seite 1174] ἡ, sc. τέχνη, die Kunst, verborgenes Wasser zu entdecken.
