Definitions

1. adjective

living a long time; having a long lifespan

“The longevous king ruled the kingdom for over 60 years.”

2. adjective

having a slow rate of growth or development, but with a long lifespan

“The longevous bacteria were found to be highly resilient.”

3. noun

a person or thing that lives a long time

“The longevous inhabitants of the island were a mystery to outsiders.”