Trough
WordNet

noun


(1)   A channel along the eaves or on the roof; collects and carries away rainwater
(2)   A container (usually in a barn or stable) from which cattle or horses feed
(3)   A long narrow shallow receptacle
(4)   A narrow depression (as in the earth or between ocean waves or in the ocean bed)
(5)   A treasury for government funds
(6)   A concave shape with an open top
 
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