# Tribonacci

> English word · Proper noun

## Definitions
1. A variant of the Fibonacci sequence in which the preceding three terms, rather than the preceding two, are summed at each iteration.

## Etymology
Blend of tri- + Fibonacci.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/tribonacci