cirrostratus

noun

cir·ro·stra·tus ˌsir-ō-ˈstrā-təs

-ˈstra-

: a fairly uniform high thin cloud layer darker than cirrus and often covering the entire sky see cloud illustration

Word History

Etymology

New Latin

First Known Use

circa 1803, in the meaning defined above

Time Traveler

The first known use of cirrostratus was circa 1803

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Browse Nearby Words

cirrostrative

cirrostratus

cirrous

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Cite this Entry

Style

“Cirrostratus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cirrostratus. Accessed 30 Jun. 2026.

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Kids Definition

cirrostratus

noun

cir·ro·stra·tus ˌsir-ō-ˈstrāt-əs

-ˈstrat-

: a fairly even high cloud layer that is darker than cirrus

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