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1. the Aurora Borealis ...1693 Scot. & Eng. dial.
2. the vapours arising from the earth on a warm day when seen flickering in the atmosphere ...Bk1905 Scot.
1693 - see Example below
"...where the North-light is also well known, it is, by reason of its
desultory motion, called Morrice-Dancers,
Merry Dancers, and Streamers."
From: A Description of the Isles of Orkney
By: James Wallace