氘

氘 U+6C18, 氘 CJK UNIFIED IDEOGRAPH-6C18 ← 気 [U+6C17] CJK Unified Ideographs 氙 → [U+6C19]

Translingual

Han character

氘 (Kangxi radical 84, 气+2, 6 strokes, cangjie input 人弓中中 (ONLL), four-corner 8021₇, composition ⿹气⿰丿丨)

References

• Kangxi Dictionary: not present, would follow page 599, character 4
• Dai Kanwa Jiten: character 17046
• Hanyu Da Zidian (first edition): volume 3, page 2010, character 3
• Unihan data for U+6C18

Chinese

simp. and trad.		氘

Glyph origin

Ideogrammic compound (會意 / 会意): 气 (“gas”) + ⿰丿丨 (“two”). Also a phono-semantic compound (形聲 / 形声), where ⿰丿丨, variant of 刀 (dāo), acts as the phonetic component. Compare 氕 (“protium”) and 氚 (“tritium”).

Etymology

From 刀 (dāo) from the glyph, possibly influenced by New Latin deuterium.

Pronunciation

• Mandarin

  (Pinyin): dāo (dao¹)

  (Zhuyin): ㄉㄠ

• Cantonese (Jyutping): dou¹

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• Mandarin
  • (Standard Chinese)⁺
    • Hanyu Pinyin: dāo
    • Zhuyin: ㄉㄠ
    • Tongyong Pinyin: dao
    • Wade–Giles: tao¹
    • Yale: dāu
    • Gwoyeu Romatzyh: dau
    • Palladius: дао (dao)
    • Sinological IPA ^(key): /tɑʊ̯⁵⁵/
• Cantonese
  • (Standard Cantonese, Guangzhou–Hong Kong)
    • Jyutping: dou¹
    • Yale: dōu
    • Cantonese Pinyin: dou¹
    • Guangdong Romanization: dou¹
    • Sinological IPA ^(key): /tou̯⁵⁵/

Definitions

氘

1. deuterium

Synonyms

• 重氫／重氢 (zhòngqīng)

See also

• 氕 (piē, “protium”)
• 氚 (chuān, “tritium”)
• 氫／氢 (qīng, “hydrogen”)