ヨウ素

Japanese

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

Alternative spelling
沃素

Chemical element
I
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Etymology

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

Pronunciation

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

Noun

ヨウ素(そ) • (yōso) 

1. iodine, I

   放(ほう)射(しゃ)性(せい)のヨウ素(そ)131(ひゃくさんじゅういち)

   hōshasei no yōso-hyakusanjūichi

   radioactive iodine-131