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| diatomic oxygen | |||
| oxygen A gaseous chemical element; an essential element in cellular respiration and in combustion processes; the most abundant element in the earth's crust and about 20% of the air by volume | |||
| E 948; oxygen | |||
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oxygen : 19 phrases in 7 subjects |
| Chemistry | 3 |
| Earth sciences | 2 |
| Electronics | 3 |
| Environment | 2 |
| Metallurgy | 6 |
| Technology | 1 |
| Transport | 2 |