One entry found for Fibonacci number.
Main Entry: Fi·bo·nac·ci number
Pronunciation: f-b-näch--, fib--
Etymology: named for Leonardo Fibonacci about 1170-about 1240 Italian mathematician : any of the integers in the infinite sequence 1, 1, 2, 3, 5, 8, 13 . . . of which the first two terms are 1 and 1 and each following term is the sum of the two just before it