eldest

from WordNet (r) 3.0 (2006)
eldest
    adj 1: first in order of birth; "the firstborn child" [syn:
           {firstborn}, {eldest}]
    n 1: the offspring who came first in the order of birth [syn:
         {firstborn}, {eldest}]
    
from The Collaborative International Dictionary of English v.0.48
Eldest \Eld"est\, a. [AS. yldest, superl. of eald old. See
   {Elder}, a.]
   1. Oldest; longest in duration. --Shak.
      [1913 Webster]

   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." --Shak.
      [1913 Webster]

            Their eldest historians are of suspected credit.
                                                  --Bp.
                                                  Stillingfleet.
      [1913 Webster]

   {Eldest hand} (Card Playing), the player on the dealer's left
      hand. --R. A. Proctor.
      [1913 Webster]
    

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