Definitions from Wiktionary (PSR)

▸ noun:  (astronomy) Abbreviation of pulsar. [(astronomy) A rotating neutron star that emits radio pulses periodically.]
▸ noun:  (aviation) Initialism of primary surveillance radar.
▸ noun:  Initialism of police service representative, an LAPD dispatcher.
▸ noun:  Initialism of pre-sentence report.
▸ noun:  (aviation, navigation) Initialism of point of safe return.
▸ noun:  (scouting) Initialism of Philmont Scout Ranch.



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