Brocken specter
noun
Brock·en specter
ˈbräkən-
variants or Brocken bow
: an optical phenomenon sometimes seen from the summit of mountains or from an aircraft when the observer is between the sun and a mass of cloud, the figures of the observer and surrounding objects being seen projected on the cloud much enlarged and often encircled by rainbow colors compare glory sense 6a (3)
Word History
Etymology
from Brocken, peak in the Harz mountains, Germany; Brocken specter, translation of German Brockengespenst