Japanese

Noun

硫安 ‎(hiragana りゅうあん, romaji ryūan, historical hiragana りうあん)

1. (inorganic chemistry) ammonium sulphate

References

1. 1 2 2006, 大辞林 (Daijirin), Third Edition (in Japanese), Tōkyō: Sanseidō, ISBN 4-385-13905-9
2. 1 2 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