ionosfera
ionosphere
noun ee-oh-noh-SFEH-rah Rare
Origin: From 'ion' (Greek 'ienai', to go) + Greek 'sphaira' (sphere), coined 1926.
Usage Note
Ionosfera is the ionised layer of the upper atmosphere (roughly 60–1,000 km altitude) that reflects radio waves and enables long-distance radio communication. It is a feminine noun. Learners in science or aviation contexts will encounter it in discussions of radio propagation and GPS signal delay.
Examples
"Le onde radio rimbalzano sulla ionosfera."
Natural Translation
Radio waves bounce off the ionosphere.
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