Altostratus Definition

ăltō-strătəs, -strātəs
altostrati
noun
An extended cloud formation of bluish or gray sheets or layers.
American Heritage
The type of gray or bluish cloud found at intermediate altitudes and consisting of a thick, dense, extensive layer of ice crystals and water droplets: may cause light precipitation.
Webster's New World

(physics, meteorology). A principal medium-level cloud type in the form of a gray or bluish (never white) sheet or layer of striated, fibrous, or uniform appearance.

Wiktionary
Synonyms:
  • altostratus cloud

Other Word Forms of Altostratus

Noun

Singular:
altostratus
Plural:
altostrati

Origin of Altostratus

  • Latin altus high al-2 in Indo-European roots stratus

    From American Heritage Dictionary of the English Language, 5th Edition

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altostratus