pse ‧ phol ‧ o ‧ gy /seˈfɒlədʒi $ siːˈfɑː-/ BrE AmE noun [uncountable] British English technical
[ Date: 1900-2000 ; Language: Greek ; Origin: psephos 'small stone, vote' ; because the ancient Greeks used small stones for voting ]
the study of how people vote in elections
—psephologist noun [countable]