strat·o·spher·ic 
(străt′ə-sfîrĭk, -sfĕr-)
(străt′ə-sfîrĭk, -sfĕr-)adj.
1. Of, relating to, or characteristic of the stratosphere.
2. Extremely or unreasonably high: "money borrowed at today's stratospheric rates of interest" (New York Times).
strat′o·spheri·cal·ly adv.