Japanese

Noun

炭酸 ‎(hiragana たんさん, romaji tansan)

1. carbonic acid

References

1. ↑ 1998, NHK日本語発音アクセント辞典 (NHK Japanese Pronunciation Accent Dictionary) (in Japanese), Tōkyō: NHK, ISBN 978-4-14-011112-3