ヨウ素

ヨウ素

Japanese

Kanji in this term
素
そ Grade: 5
on’yomi

Chemical element
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Alternative forms

• 沃素

Etymology

Compound of 沃 (yō, used phonetically) +‎ 素 (so, “chemical element”). First used by Morisaburō Ichikawa in Rika Nikki (1872).[1] 沃 was used by Shiba Ryōkai in Shichiyaku Shinsetsu (1860) as 沃顛[2] and by Heijirō Takehara in Kagaku Nyūmon (1867-1870) as 沃陳 (ヨヂウム) from Dutch jodium.

Pronunciation

• On’yomi
  • (Tokyo) ヨ​ーそ [yóꜜòsò] (Atamadaka – [1])
  • IPA^(key): [jo̞ːso̞]

Noun

ヨウ素 (hiragana and katakana ヨウそ, rōmaji yōso)

1. iodine, I

   放射性のヨウ素131

   ほうしゃせいのようそ131

   hōshasei no yōso 131

   radioactive iodine-131

References

1. Fumiko Kōji, Shōzō Kobayashi, Hiroyuki Hirata, 日本各地の明治中期の理科授業筆記の発見と当時の元素教育
2. 潘吉星, 中外科學之交流, 1993, →ISBN, page 316