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mackerel sky

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noun
an extensive group of cirrocumulus or altocumulus clouds, especially when well-marked in their arrangement: so called because of a resemblance to the scales on a mackerel.
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Origin of mackerel sky

First recorded in 1660–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use mackerel sky in a sentence

British Dictionary definitions for mackerel sky

mackerel sky

noun
a sky patterned with cirrocumulus or small altocumulus clouds

Word Origin for mackerel sky

from the similarity to the pattern on a mackerel's back
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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