pulsar

play
noun pul·sar \ˈpəl-ˌsär\

Definition of pulsar

  1. :  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

Origin and Etymology of pulsar

pulse + -ar (as in quasar)


First Known Use: 1968


PULSAR Defined for English Language Learners

pulsar

play
noun pul·sar \ˈpəl-ˌsär\

Definition of pulsar for English Language Learners

  • : a type of star that gives off a rapidly repeating series of radio waves


Learn More about pulsar


Seen and Heard

What made you want to look up pulsar? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a rounded knoll or a ridge of ice

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ