# massive compact halo object

> English word · Noun

## Definitions
1. Any kind of astronomical body comprising normal baryonic matter that in sufficient numbers might explain the apparent presence of dark matter in galaxy halos.

## Etymology
Perhaps coined with the acronym, MACHO, in mind. See also WIMP, which represents a competing hypothesis.

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