Main Entry: in·dic·tion

Pronunciation: \in-ˈdik-shən\

Function: noun

Etymology: Middle English indiccion, from Anglo-French, from Late Latin indiction-, indictio, from Latin, proclamation, from indicere to proclaim, from in- + dicere to say — more at diction

Date: 14th century

: a 15-year cycle used as a chronological unit in several ancient and medieval systems