# mascon

> English word · Noun

## Definitions
1. A region within a solid astronomical body that is of higher density than the surrounding material.
2. A lunar mare that has a greater density of rock than the surrounding area.
3. mass concentration

## Etymology
Blend of mass + concentration in 1960s by scientists Paul Muller and William Sjogren.

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