1 Definition in the Yahoo! Kids Dictionary
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"KIDS HOME STUDY REFERENCE DICTIONARY HOME WORD: stratus

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stra·tus  audio 
(strts, strts)  See the pronunciation key 

NOUN:
pl. stra·ti
A low-altitude cloud formation consisting of a horizontal layer of gray clouds.

ETYMOLOGY:
From Latin strtus, past participle of sternere, to stretch, extend; see ster-2 in Indo-European roots
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