# Fenwick tree

> English word · Noun

## Definitions
1. A data structure that maintains prefix sums over a list of numbers while allowing dynamic updates and queries in logarithmic time.

## Etymology
Named for Peter Fenwick who described the concept in 1994.

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