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longevous

American  
[lon-jee-vuhs, lawn-] / lɒnˈdʒi vəs, lɔn- /

adjective

Archaic.
  1. living to a great age; long-lived.


Etymology

Origin of longevous

First recorded in 1670–80; from Latin longaevus “aged,” equivalent to long(us) long 1 + aev(um) “time, age, lifetime” + -us adjective suffix; -ous