Tricentenary

[Tanya Shivari]

Including, or relating to, the interval of three
hundred years; tercentenary.

[Julene]

of or relating to or completing a period of 300 years

[Larrysaelek]

trī-sen′te-nā-ri, n. a space of three hundred years. [L. trecenti, three hundred—tres, three, centum, a hundred.]

[Jason Yan]

A tricentenary is a three hundredth anniversary or its celebration. It represents a period of 300 years.

[Nicolasmam]

a period of three centuries, or three hundred years, also, the three-hundredth anniversary of any event; a tercentenary