How to say "ion" in Japanese
Choosing the right word
- nounThe ordinary word for an ion in the scientific sense: an atom or molecule carrying an electric charge. Use it in physics, chemistry, and general science contexts, from textbooks to news reports.
- 航海学会こうかいがっかいnounAn organization name, not a word for the particle: the Institute of Navigation, abbreviated ION. This less common term matters only when writing about that body, never for the scientific sense of 'ion'.
Use 「イオン」 for the electrically charged particle of physics and chemistry; 航海学会 is an organization whose English name is Institute of Navigation, abbreviated ION, so it matches only that abbreviation, not the scientific term.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese equivalents
