quatercentenary
noun
qua·ter·cen·te·na·ry ˌkwä-tər-sen-ˈte-nə-rē 
-ˈsen-tə-ˌner-ē
-ˈsen-tə-ˌner-ē -sen-ˈtē-nə-rē
: a 400th anniversary or its celebration
Word History
Etymology
Latin quater four times + English centenary — more at quaternion
First Known Use
1883, in the meaning defined above
- tropical hen flea
- tropical kudzu
- tropical lake
- tropical maritime air
- tropical month
- tropical oil
- tropical rain forest
- tropical seal
- tropical sprue
- tropical storm
- tropical year
- Tropicalian
- tropicalisation
- tropicalisations
- tropicalise
- tropicalised
- tropicalises
- tropicalising
- tropicality
- tropicalization
- tropicalizations
- tropicalize
- tropicalized
- tropicalizes
- tropicalizing