altostratus From the Latin altum, ‘height’ and stratus, ‘spread out’, the name of a genus of clouds that consists of greyish sheets or layers; the cloud may be striated, fibrous, or uniform. It may be composed of ice crystals as well as water droplets. See also cloud classification.

altostratus From the Latin altum (height) and stratus (spread out). A genus of cloud consisting of greyish sheets or layers; the cloud may be striated, fibrous, or uniform. It may be composed of ice crystals as well as water droplets. See also CLOUD CLASSIFICATION.