ὑδροφαντική
From LSJ
ἕτερος ἐξ ἑτέρου σοφός τό τε πάλαι τό τε νῦν → one gets his skill from another, now as in days of old
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.