Wa·ter gall
1. A cavity made in the earth by a torrent of water; a washout.
2. A watery appearance in the sky, accompanying the rainbow; a secondary or broken rainbow.
These water galls, in her dim element,
Foretell new storms to those already spent. --Shak.
False good news are [is] always produced by true good, like the water gall by the rainbow. --Walpole.
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