quadranscentennial

From Latin quadrans, from quadrans (“quarter”) + -ennium (compare annus (“year”)) + -ālis.

• (UK) IPA^(key): /ˈkwɒd.ɹən.sɛnˈtɛn.ɪ.əl/
• (General American) IPA^(key): /ˈkwɑd.ɹən.sɛnˈtɛn.i.əl/

quadranscentennial (plural quadranscentennials)

1. The twenty-fifth anniversary of an event or happening.

   Synonym: (informal) silver jubilee

   • 2017 December 22, James Higham, “Transforming societies and transforming tourism: sustainable tourism in times of change”, in Journal of Sustainable Tourism, volume 26, number 1:

     It is a year since we marked the twenty-fifth anniversary of the Journal of Sustainable Tourism, noting then that as we “embark upon the next quadranscentennial… we recognise that the 25 years ahead present a new order of challenges confronting sustainable development and sustainable tourism”.

• (a fourth or a quarter): see quadrans

quadranscentennial (not comparable)

1. Occurring every twenty-five years.
   • 2014, Michael Gose, Common Sense: What It Means to Be a Teacher, page 166:

     So when I planned a Quadranscentennial Pnyx, the quadranscentennial gives away that I had otherwise learned my lesson not to undertake such ventures, because I would not be prepared to undertake another for 25 years, when I expect to still be teaching at the age of 91.

2. Of or related to a twenty-five-year period.

• quadranscentennial on dict.cc
• quadranscentennial in Andrew R. Walkling (2016) Masque and Opera in England, 1656-1688, Abingdon-on-Thames: Routledge
• quadranscentennial in Michael Gose (2014) Common Sense: What It Means to Be a Teacher, Lanham: Rowman & Littlefield
• quadranscentennial in Robert Gaskins (2012) Sweating Bullets: Notes about Inventing PowerPoint, San Francisco: Vinland Books