Fibonacci numbers: Meaning and Definition of

Fi•bo•nac'ci num"bers

Pronunciation: (fē"bō-nä'chē), [key]
— Math. Math.
  1. the unending sequence 1, 1, 2, 3, 5, 8, 13, 21, 34, … where each term is defined as the sum of its two predecessors. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.