ex·tant /ˈɛkstənt; ɛkˈstænt, ˈɛkˌ/
 (a.)現存的,未毀的


 Ex·tant a.
 1. Standing out or above any surface; protruded.
    That part of the teeth which is extant above the gums.   --Ray.
    A body partly immersed in a fluid and partly extant.   --Bentley.
 2. Still existing; not destroyed or lost; outstanding.
    Writings that were extant at that time.   --Sir M. Hale.
    The extant portraits of this great man.   --I. Taylor.
 3. Publicly known; conspicuous. [Obs.]

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 extant
      adj : still in existence; not extinct or destroyed or lost;
            "extant manuscripts"; "specimens of graphic art found
            among extant barbaric folk"- Edward Clodd [ant: extinct]