ἵππος .ἵππος, ὁ, ἡ, 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, καθʼ ἵππων ἅλλεσθαι, ἐξ ἵππων βῆσαι, ἵππων ἐπεβήσετο Il.:—the art of riding, though known to Hom., was an uncommon practice, cf. κέλης, κελητίζω, as Collective Noun, ἵππος, ἡ, horse, cavalry, Lat. equitatus, Hdt., Attic; always in sg., as ἵππος χιλίη a thousand horse, Hdt. ὁ ἵππος ὁ ποτάμιος the hippopotamus, Hdt. in Compos., it expressed anything large or coarse, as in our horsechestnut, horselaugh, v. ἱππόκρημνος, etc.