longevous

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lon·gev·i·ty

L0239900 (lŏn-jĕv′ĭ-tē, lôn-)n. pl. lon·gev·i·ties 1. a. Long life; great duration of life: His longevity vexed his heirs.b. Length or duration of life or viability: comparing the longevity of men and women; factors that affect the longevity of seeds.2. Long duration or continuance, as in an occupation: had unusual longevity in the company; her longevity as a star.
[Late Latin longaevitās, from Latin longaevus, ancient : longus, long; see del- in Indo-European roots + aevum, age; see aiw- in Indo-European roots.]
lon·ge′vous (-jē′vəs) adj.

lon•ge•vous

(lɒnˈdʒi vəs, lɔn-)

adj. Archaic. long-lived; living to a great age. [1670–80; < Latin longaevus aged]