vicennial

Etymology
From or directly from, from  + , from  + , from  +  +. Equivalent to +.

Adjective

 * 1) Occurring once every twenty years.
 * 2) Lasting for twenty years.

Related terms

 * (yearly), (2),  (3),  (4),  (5),  (6),  (7),  (8),  (9),  (10),  (100),  (200),  (500),  (1000),  (10,000),  (forever)

Translations

 * Italian: vicennale
 * Latin: vicennialis

Noun

 * 1) A twenty-year period
 * 2) A twentieth anniversary, particularly
 * 3) * 1909 June, John H. Vincent & al., "'89's Vicennial", The Chautauquan, Vol. 55, No. 1, p. 130:
 * Among the well established anniversaries celebrated by Chautauqua classes from year to year are the vicennials. A strong sense of comradeship is developed among members who come to Chautauqua twenty years after graduation...
 * , the festival and religious ritual held in the 20th year of a Roman emperor's reign.
 * 1) * 2022, Martin Hallmannsecker, Roman Ionia..., p. 110:
 * Roman coins mentioning the vota publica for Macrinus are RIC IV.1 5–13; on vota publica for the decennials and vicennials of emperors in the 2nd and 3rd c., see Chastagnol 1984.
 * 1) * 2022, Martin Hallmannsecker, Roman Ionia..., p. 110:
 * Roman coins mentioning the vota publica for Macrinus are RIC IV.1 5–13; on vota publica for the decennials and vicennials of emperors in the 2nd and 3rd c., see Chastagnol 1984.

Usage notes
In reference to the Roman festival, sometimes used in the plural to match Latin and provide for the variety of events.