strath

A wide, flat river valley.

[T]hoſe fair Straths that vvater’d are / VVith Tay and Tvveed’s ſmooth Streams, / VVhich gentily and daintily / Eat dovvn the flovvry Braes; / As greatly and quietly / They vvimple to the Seas.

[T]he other stream, which had its source among the mountains on the left hand of the strath, seemed to issue from a very narrow and dark opening betwixt two large rocks.

A piece of flat land beside a body of water.

[T]he place is pretty pleasant, close by Forth waterside, att the foot of Craigmor, betwixt which and the watar there is a strath very proper for walking: […]

University of Strathclyde, used especially following post-nominal letters indicating status as a graduate.