sky cover

noun

the amount of the sky that is covered by clouds, fog, haze, smoke, or the like, usually expressed in tenths of the total sky.

Origin of sky cover

First recorded in 1955–60

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Then he made a round sky-cover to fit over it, round like the houses of the Pimas.
Myths and Legends of California and the Old Southwest | Katharine Berry Judson
Then he threw it to the east, and it rose to the highest point in the sky-cover and began to slide down on the other side.
Myths and Legends of California and the Old Southwest | Katharine Berry Judson
Spring, and summer, and autumn had slipped down the hole in the Sky-cover.
Myths and Legends of the Mississippi Valley and the Great Lakes | Various
They flew down through the hole in the Sky-cover to the Earth-plain below.
Myths and Legends of the Mississippi Valley and the Great Lakes | Various

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