# trisomy

> English word · Noun · IPA /ˈtɹʌɪ.sə(ʊ)mi/ · frequency rank #79,148

## Definitions
1. The presence of three copies, instead of the normal two, of a particular chromosome of an organism.

## Etymology
From trisome + -y.

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