Etymology
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strato- 
before vowels strat-, word-forming element referring to layers or layering, also stratus clouds, from combining form of Latin stratus "a spreading," from PIE root *stere- "to spread."
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cirro- 

word-forming element meaning, in meteorology, "involving cirrus clouds," and, in biology, "involving a tendril or tendrils," from combining form of Latin cirrus "lock of hair, tendril" (see cirrus).

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