Circumference (noun)

The measurement around the outer edge of a two-dimensional object or the surface of a three-dimensional object.

Origin:

Late middle english: from latin circumferentia, from circumferre 'carry round', from circum- 'round' + ferre 'to carry'.

Examples:

1. The circumference of the Earth is roughly 40,075 kilometers.
2. The circumference of the table's circular top is 90 centimeters.
3. The circumference of a circle can be calculated using the formula pi times its diameter.
4. She measured the circumference of the tree trunk to estimate its age.
5. The tire's circumference affects the speedometer reading on a car.