muonium

American

[myoo-oh-nee-uhm] / mjuˈoʊ ni əm /

noun

Physics.

an electron and a positively charged muon bound together by electrical attraction in the same manner as the electron and proton in a hydrogen atom.

Etymology

Origin of muonium

1955–60; mu(on) + -onium, probably extracted from positronium

Example Sentences

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See Examples For:

muonium

Measuring how muonium behaves under gravity would provide the first test involving a second-generation particle.

From Science Daily ● Sep. 18, 2026

The new beam could also make much more precise laser spectroscopy experiments with muonium possible.

From Science Daily ● Sep. 18, 2026

The researchers are now building an instrument known as an interferometer to measure how Earth's gravity affects the muonium beam.

From Science Daily ● Sep. 18, 2026

If muonium responds to gravity differently from ordinary matter, the implications could be profound.

From Science Daily ● Sep. 18, 2026

The project is designed to look for an extremely rare event in which muonium, a short lived system made of a positive muon bound to an electron, spontaneously transforms into antimuonium, its antimatter counterpart.

From Science Daily ● Feb. 2, 2026

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023