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 next technical target sits around $5,182/oz, which represents 261.8% Fibonacci extension of the last major downswing from October, the analyst says.

From The Wall Street Journal • Jan. 26, 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

Not while we have the chance to invite our students to inhabit its crossroads and engage as interlocutors in its conversations with Plato, Averroes, Fibonacci, Wheatley and many more.

From Washington Post • Apr. 5, 2023

The pattern they chose was the mathematically well-studied Fibonacci sequence, in which the next number in the sequence is the sum of the previous two.

From Scientific American • Jul. 26, 2022

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

From "The Miscalculations of Lightning Girl" by Stacy McAnulty