ἵππος
Alt. ἵππος, ὁ, ἡ,
I. "a horse, mare", Lat. equus, equa, Hom., etc.:—the pl. ἵπποι in Hom. are the "chariot-horses", Il.:—hence ἵπποι is used for "the chariot" itself, καθ᾽ ἵππων ἅλλεσθαι, ἐξ ἵππων βῆσαι, ἵππων ἐπεβήσετο id=Il.:—the art of "riding", though known to Hom., was an uncommon practice, cf. κέλης, κελητίζω,
II. as Collective Noun, ἵππος, ἡ, "horse, cavalry", Lat. equitatus, Hdt., attic; always in sg., as ἵππος χιλίη "a thousand" horse, Hdt.
III. ὁ ἵππος ὁ ποτάμιος "the hippopotamus", id=Hdt.
IV. in Compos., it expressed "anything large or coarse", as in our "horsechestnut, horselaugh", v. ἱππόκρημνος, etc.