mackerel sky(redirected from Altocumulus mackerel sky)
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Related to Altocumulus mackerel sky: mackerel skies
mackerel sky[′mak·rəl ′skī]
A sky with considerable cirrocumulus or small-element altocumulus clouds, resembling the scales on a mackerel.
A condition in which there are rows of altocumulus or cirrocumulus clouds in the sky, which look like scales of a mackerel fish.