period
noun
The word "period" can have several meanings, but generally, it refers to a length of time or a specific point in time. It can also mean a punctuation mark (.) used to end sentences.
Example
- The period of time between the dinosaurs and humans is called the Cenozoic Era.
- The period of time when you are a student is called your school years.
- The period of time when you are a baby is called your infancy.