Source : Webster's Revised Unabridged Dictionary (1913)

Nestor \Nes"tor\, n. (Zo["o]l.)
   A genus of parrots with gray heads. of New Zeland and papua,
   allied to the cockatoos. See {Kaka}.

Source : WordNet®

Nestor
     n 1: (Greek mythology) a wise old counselor to the Greeks at Troy
     2: a genus of Psittacidae [syn: {genus Nestor}]