Usage: 2 forms in 2 verses
Form Translated As     In Verse(s)
ιππόδρομον course of the horses LXX.Gen.48.7
ιπποδρόμου course of the horses LXX.Gen.48.7

Liddell-Scott-Jones

ἱπποδρόμος (hippodromos) course of horses G:N-M

ἱπποδρόμος-δρομος, ,

chariot-road, λεῖος δ᾽ . ἀμφίς [Refs 8th c.BC+]

__2 race-course for chariots, [Refs 5th c.BC+]; at Andania, [Refs]; at Rome, the circus, [Refs 1st c.BC+]; μέγας .,= circus maximus, [Refs 3rd c.BC+]
__II ἱπποδρόμος, , light horseman, . ψιλοί [Refs 5th c.BC+]