a region in a magnetic bottle where the magnetic field increases abruptly, causing charged particles that enter it to be reflected.
Origin of magnetic mirror
First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
physics a configuration of magnetic fields used to confine charged particles, as in a magnetic bottle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012