Troughs

noun

1. A long, narrow container, open on top, for feeding or watering animals.

   "One of Hank's chores was to slop the pigs' trough each morning and evening."

2. Any similarly shaped container.
3. A short, narrow canal designed to hold water until it drains or evaporates.

   "There was a small trough that the sump pump emptied into; it was filled with mosquito larvae."

4. A gutter under the eaves of a building; an eaves trough.

   "The troughs were filled with leaves and needed clearing."

5. A channel for conveying water or other farm liquids (such as milk) from place to place by gravity; any ‘U’ or ‘V’ cross-sectioned irrigation channel.