Fibonacci

British  

/ fiboˈnattʃi /

noun

1. Leonardo (leoˈnardo), also called Leonardo of Pisa . ?1170–?1250, Italian mathematician: popularized the decimal system in Europe

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Fibonacci Scientific  

/ fē′bə-nä′chē /

1. Italian mathematician who popularized the modern Arabic system of numerals in the western world and discovered the Fibonacci sequence of integers.

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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

When Millière asked directly for the 83rd Fibonacci number, however, GPT got it wrong: this suggests the system wasn’t just parroting the Internet.

From Scientific American • May 11, 2023

The 13th-century Italian Fibonacci returned from his education in North Africa armed with Hindu-Arabic numerals, liberating his fellow mathematicians and future generations from the limitations of Roman numerals and counting boards.

From Washington Post • Apr. 5, 2023

My walls are decorated with images of the Fibonacci spiral in nature: flower petals, pinecones, nautilus shells, far-off galaxies.

From "The Miscalculations of Lightning Girl" by Stacy McAnulty