Fibonacci number

noun Fi·bo·nac·ci number \ˌfē-bə-ˈnä-chē-, ˌfi-bə-\

Definition of Fibonacci number

  1. :  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

Origin and Etymology of fibonacci number

Leonardo Fibonacciab1250 Italian mathematician

First Known Use: 1914

Learn More about fibonacci number

Seen and Heard

What made you want to look up Fibonacci number? Please tell us where you read or heard it (including the quote, if possible).