Ionosphere
/ˈaɪ.ə.nəˌsfɪr/noun
The region of the Earth's atmosphere that contains a high concentration of ions and free electrons.
Did you know?The term 'ionosphere' was coined in the early 20th century, linking the ancient concept of 'ions'—charged particles—to the mystical energies of the atmosphere, believed to influence radio waves and even psychic phenomena.
Etymological Timeline
Ancient Greek
Greek
ἰών (ion)
“going, wandering, referring to the movement of charged particles.”
19th Century
English
ion
“A term used to describe charged particles, derived from Greek 'ion'.”
Early 20th Century
English
ionosphere
“A newly coined term describing the atmospheric layer filled with ions, established in the context of radio communication.”
Modern English
English
ionosphere
“The current term denoting the electrically charged layer of the atmosphere, crucial for radio propagation and atmospheric science.”
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