Dictionary Home »
Dictionary Definitions » ionosphere
ionosphere
noun
the outer part of the earth's atmosphere, beginning at an altitude of c. 55 km (c. 34 mi) and extending to the highest parts of the atmosphere: it contains several regions that consist of a series of constantly changing layers characterized by an appreciable electron and ion content
Related Forms:
- ionospheric adjective
See ionosphere in American Heritage Dictionary 4
Learn more about ionosphere
link/cite print suggestion box