ionosphere
/aɪˈɒnəsfɪə(r)/noun
1- the layer of the earth's atmosphere which contains a high concentration of ions and free electrons and is able to reflect radio waves. It lies above the mesosphere and extends from about 80 to 1,000 km above the earth's surface电离层（地球大气层之一, 有高含量的离子及自由电子, 可反射无线电波; 位于中间层之上, 地球上空80到1,000公里处）。
1.1
- a similar region above the surface of another planet（其他行星上空的）电离层。
派生词