Decennial (adjective)

1. Relating to a period of ten years or happening once every ten years.
2. Relating to a number ten or consisting of ten units.

Origin:

From the latin word decennium, meaning a period of ten years, and the suffix -al, meaning relating to.

Examples:

1. The decennial census provides a detailed picture of the population and its characteristics.
2. The decennial celebration of the school's founding was a grand affair, attended by alumni from across the country.
3. The decennial cycle of the Maya calendar was comprised of several different calendars and almanacs.
4. The decennial growth rate of the economy was measured in terms of gross domestic product.
5. The decennial plan for the development of the city included proposals for new infrastructure and housing.