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Fibonacci

British

/ fiboˈnattʃi /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Fibonacci Scientific

/ fē′bə-nä′chē /

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

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

From Scientific American • May 11, 2023

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

Just that thought made Emma want to start reciting reliable things to herself again: Fibonacci numbers.

From "The Strangers" by Margaret Peterson Haddix

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023