the duration or span of existence of an organism or entity

a stage in a timeline of development or history

विकास या इतिहास की समयरेखा में एक चरण

English Usage: In the life period of ancient civilizations, many innovations were made.

Hindi Usage: प्राचीन सभ्यताओं के जीवनकाल में कई आविष्कार किए गए।