ἱππομαχία
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
ἡ,
A horse-fight, action of cavalry, Th.2.22, 4.72, Pl.La.193b, etc.
German (Pape)
[Seite 1260] ἡ, Reiterkampf, Plat. Lach. 193 b Thuc. 2, 22 u. Sp.