tri·cen·ten·ni·al 
(trī′sĕn-tĕnē-əl)
(trī′sĕn-tĕnē-əl)adj.
Tercentenary.
n.
A tercentenary event or celebration.
- inexplainable
- inexplainably
- inexplicability
- inexplicable
- inexplicableness
- inexplicably
- inexplicit
- inexpressibility
- inexpressible
- inexpressibly
- inexpressive
- inexpressively
- inexpugnability
- inexpugnable
- inexpugnably
- inextensible
- in extenso
- inextinguishable
- inextinguishably
- inextirpable
- in extremis
- inextricability
- inextricable
- inextricableness
- inextricably