Fibonacci sequence

British  

/ ˌfɪbəˈnɑːtʃɪ /

noun

1. the infinite sequence of numbers, 0, 1, 1, 2, 3, 5, 8, etc, in which each member ( Fibonacci number ) is the sum of the previous two

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Fibonacci sequence Scientific  

1. A sequence of numbers, such as 1, 1, 2, 3, 5, 8, 13 … , in which each successive number is equal to the sum of the two preceding numbers. Many shapes occurring in nature, such as certain spirals, have proportions that can be described in terms of the Fibonacci sequence.

2. See also golden section

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Etymology

Origin of Fibonacci sequence

named after Leonardo _Fibonacci

Example Sentences

The ad, titled “Good Will Dunkin’,” featured Affleck as the original brainy Boston math whiz, who happens to work at Dunkin’ and arranges a display of Munchkins in a Fibonacci sequence.

From The Wall Street Journal • Feb. 9, 2026

“One of the most beautiful vegetables to grace our planet,” Selengut says of romanesco’s alien gorgeousness in her book, noting that it’s “also the mathematical nerd’s veggie of choice,” given its Fibonacci sequence formations.

From Seattle Times • Feb. 9, 2024

The philosopher typed in a program to calculate the 83rd number in the Fibonacci sequence.

From Scientific American • May 11, 2023

He was a famous 12th century Italian mathematician who invented the Fibonacci sequence which stated each number is the sum of the two preceding ones.

From The Guardian • Dec. 30, 2019

And he has posters with equations, and 1 with the Fibonacci sequence.

From "The Miscalculations of Lightning Girl" by Stacy McAnulty