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Fibonacci numbers

[fee-boh-nah-chee] /ˌfi boʊˈnɑ tʃi/
plural noun, Mathematics.
the unending sequence 1, 1, 2, 3, 5, 8, 13, 21, 34, … where each term is defined as the sum of its two predecessors.
Also called Fibonacci sequence.
Origin of Fibonacci numbers
1890-95; after Leonardo Fibonacci, 13th-century Italian mathematician Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for fibonacci sequence

Fibonacci sequence

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
Word Origin
named after Leonardo Fibonacci
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
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fibonacci sequence in Science
Fibonacci sequence  

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. See also golden section.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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