Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
ionosphere | Yes | No | No | No |
Heaviside layer | Yes | No | No | No |
ionosphere (noun) | Heaviside layer (noun) |
---|---|
the outer region of the Earth's atmosphere; contains a high concentration of free electrons | a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length |