- a type of neutron star that has a very intense magnetic field, over 1000 times greater than that of a pulsar
C20: from magnet (ic) (st) ar, on the model of quasar
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
Examples from the Web for magnetar
Light emitted by the hot gas swirling around the black hole passed near this magnetar before reaching us.
One magnetar is only about a light-year from the black hole at the center of the Milky Way.
That extra spin in the progenitor star might have been enough to give the neutron star more magnetic power, making it a magnetar.