before vowels, hipp-, word-forming element meaning "horse," from Greek hippo-, from hippos "horse," from PIE root *ekwo- "horse."
Entries linking to hippo-
*ekwo-
Proto-Indo-European root meaning "horse." Perhaps related to *ōku- "swift."
It forms all or part of: alfalfa; Eohippus; equestrian; equine; equus; hippo-; hippocampus; Hippocratic; Hippocrene; hippocrepian; hippodrome; hippogriff; Hippolytus; hippopotamus; Philip; philippic; Philippines; Xanthippe.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit açva-, Avestan aspa-, Greek hippos, Latin equus, Old Irish ech, Old Church Slavonic ehu-, Old English eoh, Gothic aihwa- all meaning "horse."
hippomania n.
"excessive fondness for horses" (especially in reference to the intense and passionate interest in horses developed in some girls between ages 10 and 14), 1956, from hippo- "horse" + mania.