Try Our Apps


What is the origin of "February"?


[al-toh-strey-tuh s, -strat-uh s] /ˌæl toʊˈstreɪ təs, -ˈstræt əs/
noun, plural altostratus. Meteorology.
a cloud of a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus: of medium altitude, about 8000–20,000 feet (2450–6100 meters).
Origin of altostratus
1890-95; alto- + stratus Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
Cite This Source
British Dictionary definitions for altostratus


/ˌæltəʊˈstreɪtəs; -ˈstrɑː-/
noun (pl) -ti (-taɪ)
a layer cloud at an intermediate height of about 2400 to 6000 metres (8000 to 20 000 feet)
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
Cite This Source
altostratus in Science
Plural altostrati (āl'tō-strāt'ī')
A mid-altitude cloud that extends in flat, smooth sheets or layers of varying thickness. Altostratus clouds generally form between 2,000 and 6,100 m (6,560 and 20,000 ft) and often produce long, steady rain showers. See illustration at cloud.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for altostratus

Few English speakers likely know this word

Word Value for altostratus

Scrabble Words With Friends

Nearby words for altostratus