borealisn.
Etymology: Short for aurora borealis n. at aurora n. Compounds 1.Previous versions of the OED give the stress as: boreˈalis.
1790 R. Burns Tam o' Shanter 63 in (1968) II. 559 Or like the borealis race, That flit ere you can point their place.
This entry has not yet been fully updated (first published 1887; most recently modified version published online December 2020).