trough
71trough — n. 1 a long narrow open receptacle for water, animal feed, etc. 2 a channel for conveying a liquid. 3 an elongated region of low barometric pressure. 4 a hollow between two wave crests. 5 the time of lowest economic performance etc. 6 a region… …
72trough roof. — See M roof. [1900 05, Amer.] * * * …
73Trough lolly — the solid piece of perfumed disinfectant in a men s urinal …
74trough lolly — Australian Slang the solid piece of perfumed disinfectant in a men s urinal …
75trough bottom — (not preferred) refer to glacial valley floor …
76trough end — (not recommended: refer to cirque, cove) The steep, semicircular rock wall forming the abrupt head or end of a U shaped valley. Compare: headwall. GG …
77trough valley — (not preferred) refer to U shaped valley …
78trough wall — (not preferred) refer to glacial valley wall …
79trough roof — noun 1. : m roof 2. : a roof of hollowed out split logs laid from ridge to eaves …
80trough roof. — See M roof. [1900 05, Amer.] …