strat·o·sphere 
(str
t
-sfîr
) See the pronunciation key
NOUN:
ETYMOLOGY:
French stratosphère : Latin str
tus, a spreading out ; see stratus + -sphère, sphere (from Old French espere; see sphere)
(str
t-sfîr) See the pronunciation key NOUN:
- The region of the atmosphere above the troposphere and below the mesosphere.
- An extremely high or the highest point or degree on a ranked scale: business expenses in the stratosphere.
ETYMOLOGY:
French stratosphère : Latin str
tus, a spreading out ; see stratus + -sphère, sphere (from Old French espere; see sphere)
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