Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for Alto-stratus from the 1913 edition of Webster's Revised Unabridged Dictionary. Define Alto-stratus using one of the most comprehensive free online dictionaries on the web.

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Alto-stratus
Part of Speech: noun
Results: 1
1. A cloud formation similar to cirro- stratus, but heavier and at a lower level.
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