in·dic·tion 
(ĭn-dĭkshən)
(ĭn-dĭkshən)n.
A 15-year cycle used as a chronological unit in ancient Rome and incorporated in some medieval systems.
[Middle English indiccioun, from Late Latin indictiō, indictiōn-, proclamation, period of 15 years, from Latin indictus, past participle of indīcere, to proclaim : in-, intensive pref.; see IN-2 + dīcere, to say; see deik- in the Appendix of Indo-European roots.]
- in force
- inform
- informal
- informality
- informally
- informant
- informatics
- information
- information age
- informational
- information entropy
- information science
- information superhighway
- information technology
- information theory
- informative
- informatively
- informativeness
- informatory
- informed
- informed consent
- informer
- infotain
- infotainment
- infra-