mackerel sky
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.
Origin of mackerel sky
First recorded in 1660–70
Words nearby mackerel sky
mackenzie mountains,
mackerel,
mackerel breeze,
mackerel gull,
mackerel shark,
mackerel sky,
mackerras,
mackinac,
mackinac bridge,
mackinaw,
mackinaw blanket
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