radio meteor(radar meteor) See meteor.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
radio meteor[′rād·ē·ō ′mēd·ē·ər]
A meteor which has been detected by the reflection of a radio signal from the meteor trail of relatively high ion density (ion column); such an ion column is left behind a meteoroid when it reaches the region of the upper atmosphere between about 50 and 75 miles (80 and 120 kilometers), although occasionally radio meteors are detected at higher altitudes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.