A0114800 (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) na scientist who studies the upper atmosphereEncyclopediaSeeaeronomy