Main Entry: Fi·bo·nac·ci number

Pronunciation: \ˌfē-bə-ˈnä-chē-, ˌfi-bə-\

Function: noun

Etymology: Leonardo Fibonacci diedab1250 Italian mathematician

Date: 1914

: an integer in the infinite sequence 1, 1, 2, 3, 5, 8, 13,…of which the first two terms are 1 and 1 and each succeeding term is the sum of the two immediately preceding