ケイ素

Japanese

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

Alternative spellings
珪素硅素

Chemical element
Si
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Etymology

Compound of 珪 (kei, “silicon”, from 珪土 (keido, “silica”)) +‎ 素 (so, “element”). Appears in the 1900 work 化学語彙 (Kagaku Goi, “Chemical Vocabulary”) by 櫻井錠二 (Sakurai Jōji).[1]

The spelling shifted to using katakana for the kei portion as part of a general trend in Japanese natural sciences.[2]

Pronunciation

(Tokyo) けーそ [kéꜜèsò] (Atamadaka – [1])[2]
IPA^(key): [ke̞ːso̞]

Noun

ケイ素(そ) • (keiso)

silicon, Si

Synonyms

シリコン (shirikon)

Derived terms

ケイ素(そ)鋼(こう) (keisokō): silicon steel
ケイ素(そ)樹(じゅ)脂(し) (keiso jushi): silicone resin

References

Shōgaku Tosho (1988) 国語大辞典（新装版） [Unabridged Dictionary of Japanese (Revised Edition)] (in Japanese), Tōkyō: Shogakukan, →ISBN
Matsumura, Akira, editor (2006), 大辞林 [Daijirin] (in Japanese), Third edition, Tōkyō: Sanseidō, →ISBN

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[KDJ-1] Shōgaku Tosho (1988) 国語大辞典（新装版） [Unabridged Dictionary of Japanese (Revised Edition)] (in Japanese), Tōkyō: Shogakukan, →ISBN

[DJR-2] Matsumura, Akira, editor (2006), 大辞林 [Daijirin] (in Japanese), Third edition, Tōkyō: Sanseidō, →ISBN