# haploinsufficiency

> English word · Noun

## Definitions
1. The state of a diploid organism having only a single copy of a particular gene, the other copy being inactivated due to mutation

## Etymology
From haplo- + insufficiency.

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