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Related to firth: Solway Firth
frith,Scottish term applied to an arm of the sea, usually an estuary or strait. For Firth of Clyde, see ClydeClyde,
principal river of SW Scotland, 106 mi (171 km) long, rising in the Southern Uplands and flowing generally NW through Glasgow to the Firth of Clyde. It drains c.1,480 sq mi (3,830 sq km).
..... Click the link for more information. ; for Firth of Forth, see ForthForth,
river, c.60 mi (100 km) long, formed by streams that join near Aberfoyle in Stirling, S central Scotland. It meanders generally eastward past the town of Stirling to the Firth of Forth at Alloa. Its chief tributaries are the Teith and Allan rivers.
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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
a relatively narrow inlet of the sea, esp in Scotland
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005