# Fibonacci-sequence definition

The sequence of numbers, 1, 1, 2, 3, 5, 8, 13, ... , in which each successive number is equal to the sum of the two preceding numbers.

noun

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.

## Other Word Forms

### Noun

Singular:

fibonacci-sequence
Plural:

fibonacci-sequences## Origin of fibonacci-sequence

*After Leonardo**Fibonacci**(died c. 1250), Italian mathematician*### From American Heritage Dictionary of the English Language, 5th Edition