# meson

> English word · Noun · IPA /ˈmɛs.ɒn/ · frequency rank #80,669

## Definitions
1. The mesial plane dividing the body into similar right and left halves.

## Etymology
From Ancient Greek μέσον (méson, “middle”). Doublet of medium.

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