terce-, ter- +

In the Roman Catholic Church, the third of the seven separate canonical hours that are set aside for prayer each day.

1. A male hawk; especially, male peregrine or gyrfalcon.
2. Etymology: "male falcon"; from Old French tercel (c.1200), from Middle Latin tertiolus, from Latin tertius, "third".

There are various theories as to why it is called this; one says it's because the males are a third smaller than the females; another because a third egg in the nest (smaller than the other two) is believed always to produce a male bird.

1. A year, or an exact day, 300 years after an event, usually one of special historic significance.
2. Coinciding with the 300th anniversary of an event, and often celebrating or commemorating the event.

A 300th anniversary or its celebration.

A group of three lines of verse that rhyme with each other or with another group of three.

1. A sequence of three cards of the same suit.
2. The third of eight positions from which a fencing parry can be made.
3. A former measure of capacity equal to (42 wine gallons).
4. Etymology: from Old French, from Latin tertia, feminine of tertius, "a third"; from base of tres, "three".