aeronomy

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Related to aeronomical: aeronautical, aeronautical engineering

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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

aeronomy

(ɛəˈrɒnəmɪ)
n
(Physical Geography) the science of the earth's upper atmosphere
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ae•ron•o•my

(ɛəˈrɒn ə mi)

n.
the study of chemical and physical phenomena in the upper atmosphere.
[1955–60]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Jesse's studies signalled the beginning of 'aeronomical research', the regular study of the upper atmosphere, now called 'aeronomy'.