el·dest /ˈɛldəst/
  (a.)最年長的;年事最高的
  Eld·est a.
  1. Oldest; longest in duration.
  2. Born or living first, or before the others, as a son, daughter, brother, etc.; first in origin. See Elder. “My lady's eldest son.”
     Their eldest historians are of suspected credit.   --Bp. Stillingfleet.
  Eldest hand Card Playing, the player on the dealer's left hand.
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  eldest
       adj : first in order of birth; "the firstborn child" [syn: firstborn]
       n : the offspring who came first in the order of birth [syn: firstborn]