We found one dictionary that defines the word Proton-to-electron mass ratio:

General (1 matching dictionary)

1. Proton-to-electron mass ratio: Wikipedia, the Free Encyclopedia

▸ Words similar to Proton-to-electron mass ratio ▸ Usage examples for Proton-to-electron mass ratio ▸ Idioms related to Proton-to-electron mass ratio ▸ Wikipedia articles (New!) ▸ Words that often appear near Proton-to-electron mass ratio ▸ Rhymes of Proton-to-electron mass ratio ▸ Invented words related to Proton-to-electron mass ratio