Англо-русский словарь - pulsar
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3.
n. Astron. a cosmic source of regular and rapid pulses of radiation usu. at radio frequencies, e.g. a rotating neutron star. Etymology: pulsating st ar, after quasar ...Толковый словарь английского языка Oxford English Reference
4.
noun Etymology: pulse + -ar (as in quasar) Date: 1968 a celestial source of pulsating electromagnetic radiation (as radio waves) characterized by a short relatively constant interval (as .033 second) between pulses that is held to be a rotating neutron star ...Merriam-Webster Collegiate Dictionary
5.
(pulsars) A pulsar is a star that spins very fast and cannot be seen but produces regular radio signals. N-COUNT ...Collins COBUILD Advanced Learner's English Dictionary
6.
~ n an object that is far away in space and like a star, that produces a regular radio signal ...Longman Dictionary of Contemporary English
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