1. Every hundred years; once in a century
   "the birthday of this city is being celebrated centennially"

See also: centennial

• fire-wheel
• fire-worship
• firearm
• fireball
• firebase
• firebird
• fireboat
• firebomb
• firebox
• firebrand
• firebrat
• firebreak
• firebrick
• firebug
• fireclay
• firecracker
• fired
• firedamp
• firedog
• firedrake
• firefight
• firefighter
• firefighting
• firefly
• fireguard