英日字典: ar
The ar has 3 Senses.
- argon, ar, atomic number 18
- Ar, アルゴン
- a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
- 無色、無臭の不活性気体
- ar, are
- アール
- a unit of surface area equal to 100 square meters
- 100平方メートルに等しい表面積の単位
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