-enni-, -ennial, -ennium
(Latin: year, years)
tricentennial
1. Relating to or completing a period of 300 years.
2. A space of 300 hundred years.
3. A reference to 300 years or a period of 300 years.
4. A tercentenary event or celebration.
2. A space of 300 hundred years.
3. A reference to 300 years or a period of 300 years.
4. A tercentenary event or celebration.
triennial
1. Existing or lasting for three years, three-years; changed every three years.
2. Recurring every three years.
3. A commemoration or celebration of an event that occurred three years earlier; a third anniversary.
2. Recurring every three years.
3. A commemoration or celebration of an event that occurred three years earlier; a third anniversary.
triennially
1. Referring to a third anniversary.
2. Descriptive of something which appears or occurs every three years.
3. Referring to a period of three years; triennium.
2. Descriptive of something which appears or occurs every three years.
3. Referring to a period of three years; triennium.
triennium
A space or period of three years.
undecennial
vicennial (adjective)
1. A reference to that which happens once every 20 years.
2. Descriptive of something that lasts or exists for 20 years.
2. Descriptive of something that lasts or exists for 20 years.
