adj including, or relating to, the interval of three hundred years; tercentenary.
2. tricentenary ·noun a period of three centuries, or three hundred years, also, the three-hundredth anniversary of any event; a tercentenary.
adj including, or relating to, the interval of three hundred years; tercentenary.
2. tricentenary ·noun a period of three centuries, or three hundred years, also, the three-hundredth anniversary of any event; a tercentenary.
Webster English vocab. Английский словарь Webster. 2012