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| English thesaurus | |||
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| RARE | |||
| Rare: 103 phrases in 21 subjects |
| Abbreviation | 1 |
| Astronomy | 1 |
| Business | 1 |
| Chemistry | 16 |
| Communications | 2 |
| Earth sciences | 17 |
| Electronics | 1 |
| Environment | 4 |
| General | 20 |
| Geology | 1 |
| Health care | 6 |
| Hobbies and pastimes | 1 |
| Measuring instruments | 3 |
| Medical | 2 |
| Metallurgy | 2 |
| Mining | 5 |
| Nuclear physics | 2 |
| Optics branch of physics | 4 |
| Physics | 8 |
| Polygraphy | 3 |
| Technology | 3 |
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