aeronomist


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aer·on·o·my

 (â-rŏn′ə-mē)
n.
The study of the upper atmosphere, especially of regions of ionized gas.

aer·on′o·mer n.
aer′o·nom′ic, aer′o·nom′i·cal adj.
aer·on′o·mist n.

aeronomist

(ɛəˈrɒnəˌmɪst)
n
a scientist who studies the upper atmosphere