411 REFERENCE · Wiktionary
Alexander's band
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
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Etymology
Named after Alexander of Aphrodisias, who first described it in 200 AD.
Noun
The area of unlit sky between two rainbows, caused by the deviation angles of the primary and secondary rainbows.
en Alexander's dark band
See also
en double rainbow
en eponyms