n.
Pronunciation: ˌ er- ' ä-n ə -m ē
Function: noun
Date: 1946
: a science that deals with the physics and chemistry of the upper atmosphere of planets
– aer · on · o · mer \ -m ə r \ noun
– aer · o · nom · ic \ ˌ er- ə - ' nä-mik \ adjective
– aer · on · o · mist \ ˌ er- ' ä-n ə -mist \ noun