Fibonacci number
noun
Fi·bo·nac·ci number
ˌfē-bə-ˈnä-chē- 
ˌfi-bə-
: 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
Word History
Etymology
Leonardo Fibonacci †about 1250 Italian mathematician
First Known Use
1914, in the meaning defined above
Dictionary Entries Near Fibonacci number
Cite this Entry
“Fibonacci number.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Fibonacci%20number. Accessed 20 Apr. 2024.
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Kids Definition
Fibonacci number
noun
Fi·bo·nac·ci number
ˌfē-bə-ˈnäch-ē-
ˌfib-ə-
: any of the integers in the infinite sequence 1, 1, 2, 3, 5, 8, 13 … of which the first two terms are 1 and 1 and each following term is the sum of the two just before it
Etymology
named for Leonardo Fibonacci about 1170–about 1240 Italian mathematician
More from Merriam-Webster on Fibonacci number
Britannica.com: Encyclopedia article about Fibonacci number
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