noun Download 🔗Share A time period of indeterminate length, generally more than one year. Examples : "Several eras of my family's history are documented in old photo albums. " time period history age Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A unit of time, smaller than eons and greater than periods. Examples : "The Mesozoic and Cenozoic are two of the most well-known eras in the history of Earth. " time history geology age Chat with AIVocabulary GamePractice Reading