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A trough is a box-like drinking vessel for farm animals. Other senses of the word refer to things that are lower than their surroundings, like a trough:
- Trough (physics)
- Trough (meteorology);
- Trough (geology);
- a trough is also a noticeable and statistically recordable decline in an economy or graph.
- in chemistry it can be a Langmuir Blodgett Trough
See also trow.