Definition of pulsar noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈpʌlsɑː(r)//
; NAmE NAmE//ˈpʌlsɑːr//
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a star that cannot be seen but that sends out regular rapid radio signals compare quasar Word Originfrom puls(ating st)ar, on the pattern of quasar.
See the Oxford Advanced American Dictionary entry: pulsar