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| river A stream of water which flows in a channel from high ground to low ground and ultimately to a lake or the sea, except in a desert area where it may dwindle away to nothing. A river and all its tributaries within a single basin is termed a drainage system | |||
| abhainn: 4 phrases in 4 subjects |
| Environment | 1 |
| Life sciences | 1 |
| Natural resourses and wildlife conservation | 1 |
| Transport | 1 |