How to pronounce muon

muon is most commonly pronounced "MYOO on" (/ˈmjuːɒn/). This is the widely-used reading among engineers, though edge cases exist.

Hidden-layer optimizer (MomentUm Orthogonalized by Newton-schulz) by Keller Jordan, used to set NanoGPT speedrun records and in large-scale pretraining. Pronounced like the subatomic particle: MYOO-on (two syllables), not "moo-on" or spelled out M-U-on.

Source: Keller Jordan — "Muon optimizer"

Pronouncing project and product names correctly avoids the small but persistent friction of being gently corrected during standups, conference Q&As, and team calls. Hearing the word a few times locks in the right reading better than reading IPA ever will. Pronounce is a community-maintained dictionary — every entry tagged with a confidence level and (where possible) a citable source.