The Collaborative International Dictionary of English v.0.48:

Apricot \A"pri*cot\, n. [OE. apricock, abricot, F. abricot, fr.
   Sp. albaricoque or Pg. albricoque, fr. Ar. albirq[=u]q,
   al-burq[=u]q. Though the E. and F. form abricot is derived
   from the Arabic through the Spanish, yet the Arabic word
   itself was formed from the Gr. praiko`kia, pl. (Diosc. c.
   100) fr. L. praecoquus, praecox, early ripe. The older E.
   form apricock was prob. taken direct from Pg. See
   Precocious, Cook.] (Bot.)
   A fruit allied to the plum, of an orange color, oval shape,
   and delicious taste; also, the tree (Prunus Armeniaca of
   Linn[ae]us) which bears this fruit. By cultivation it has
   been introduced throughout the temperate zone.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Prunus armeniaca
    n 1: temperate zone tree bearing downy yellow to rosy fruits
         [syn: common apricot, Prunus armeniaca]