# Fibonacci numbers

[ fee-boh-nah-chee ]SHOW IPA

/ ˌfi boʊˈnɑ tʃi /PHONETIC RESPELLING

### 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.

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What Are The Words For The Biggest Numbers In Existence?When it comes to large numbers, we've got lots to discuss. You might say there's a garthousand ways to talk about numbers so large they are written in scientific notation or exist only in the imagination. Let's take a look at some of the vocabulary, definitions, and linguistic trivia surrounding large numbers.

## Origin of Fibonacci numbers

1890–95; after Leonardo Fibonacci, 13th-century Italian mathematician

Also called Fibonacci sequence.

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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019