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[strey-tuh s, strat-uh s] /ˈstreɪ təs, ˈstræt əs/
noun, plural strati
[strey-tahy, strat-ahy] /ˈstreɪ taɪ, ˈstræt aɪ/ (Show IPA)
a cloud of a class characterized by a gray, horizontal layer with a uniform base, found at a lower altitude than altostratus, usually below 8000 feet (2400 meters).
Origin of stratus
1795-1805; < Latin strātus; see stratum Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for stratus
Historical Examples
  • During forenoon notice a distinct terra-cotta or biscuit colour in the stratus clouds to the north.

    South! Sir Ernest Shackleton
  • Here are situated stratus and Trichonium, which has an excellent soil.

  • Through the gloom it appeared like a cloud, the lines of bedding giving to it the stratus character.

  • As the Cumulus belongs to the day, so does the stratus to the night.

    The Rain Cloud Anonymous
  • They assume at different times and in different seasons, different shapes like those of the scud, the cumulus, or the stratus.

    The Philosophy of the Weather Thomas Belden Butler
  • The stratus, an extended continuous level sheet of cloud, increasing from beneath.

    The Reason Why Anonymous
  • It is of variable extent and thickness, and is called stratus, a bed or covering.

    The Rain Cloud Anonymous
  • The wind lulled, and heavy clouds of stratus appeared in the east, towards evening.

  • Is the stratus of the upper regions of the atmosphere, heavier looking than the cirrus, but not so heavy as the stratus.

    The Sailor's Word-Book William Henry Smyth
  • stratus is a thin uniform layer of cloud at a very low level.

    Sounding the Ocean of Air A. Lawrence Rotch
British Dictionary definitions for stratus


noun (pl) -ti (-taɪ)
a grey layer cloud Compare cirrus (sense 1), cumulus
Word Origin
C19: via New Latin from Latin: strewn, from sternere to extend
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for stratus

"a low layer of cloud," 1803, from Latin stratus "a spreading," from stratus, past participle of sternere (see stratum).

Online Etymology Dictionary, © 2010 Douglas Harper
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stratus in Science
  (strāt'əs, strā'təs)   
Plural strati (strāt'ī, strā'tī)
A diffuse, grayish cloud that often produces drizzle and is formed primarily in altitudes no higher than 2,000 m (6,560 ft). A stratus cloud close to the ground or water is called fog. See illustration at cloud.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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stratus in Technology
One of the leading manufacturers of fault-tolerant computer systems. While virtually all of Stratus' core hardware and software is sold into the financial services, telecommunications, travel and transportation, and gaming these markets, a broad range of middleware and applications are developed and marketed by Stratus, its subsidiaries, and third party partners.
Yearly sales $609M, profits $43.5M (1996).
The Free On-line Dictionary of Computing, © Denis Howe 2010
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