MEANING: noun: The study of horses.

ETYMOLOGY: From Greek hippo- (horse) + -logy (study). Ultimately from the Indo-European root ekwo- (horse), which also gave us equestrian, equitant, hippocampus, hippogriff, and the name Philip (lover of horses). Earliest documented use: 1854.

HIPOLOGY - the study of the leg/pelvis joint

CHIPPOLOGY - INTEL's patent portfolio

HAPPOLOGY - how a Brit says "I'm sorry"

(And don't forget "hippopotamus" is a "river horse." The Potomac River is redundant.)