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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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