|MACHO (mä'chō) Pronunciation Key
Short for massive astrophysical compact halo object.Any of various massive dark objects, such as a brown dwarf star, black hole, or large planet, found in a galactic halo. MACHOs are thought to make up at least a part of the dark matter that apparently pervades much of the universe.
The often exaggerated, aggressive virility of a male: “Jim likes to wear a torn T-shirt and a black leather jacket when he rides his motorcycle. I guess he thinks it makes him look macho.” The original Spanish word means “male.”
massive astrophysical compact halo object