Eldest

Part of speech: adjective (a.)

1. Oldest; longest in duration. Shak.

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. Their eldest historians are of suspected credit. Bp. Stillingfleet. Eldest hand (Card Playing), the player on the dealer's left hand. R. A. Proctor.