noun, plural cir·ro·stra·tus.
- cirrus clouds,
Origin of cirrostratus
Examples from the Web for cirrostratus
Cirri and cirrostratus clouds have been very prevalent during the day, and cumulostratus during the night.
Night clear and very cold; no wind; towards morning, sky became slightly overcast with cirrostratus clouds.
Towards afternoon, cirrocumulus and cirrostratus began to appear moving northward.