- derived from Old Norse grein, this term can be used of a fork or division in the course of a river or valley. An example is found in the 1825 Supplement to John Jamieson's Etymological Dictionary of the Scottish Language (1808):
The branches of a valley at the upper end, where it divides into two; as, Lewinshope Grains.
Lewinshope, located in Yarrow in the Borders, is itself a valley.