Source : Webster's Revised Unabridged Dictionary (1913)

Long-lived \Long"-lived`\, a.
   Having a long life; having constitutional peculiarities which
   make long life probable; lasting long; as, a long-lived tree;
   they are a longlived family; long-lived prejudices.

Source : WordNet®

long-lived
     adj : existing for a long time; "hopes for a durable peace"; "a
           long-lasting friendship" [syn: {durable}, {lasting}, {long-lasting}]