Definitions from Wiktionary (PSC)

▸ noun:  (astronomy, obsolete) Abbreviation of parsec.
▸ noun:  (geometry) Abbreviation of parallax second. [A unit of length, used in astronomy, defined as the distance from the Earth of an object that exhibits a parallax of 1 arcsecond. It is approximately equal to 3.08568025 × 10¹³ kilometers or 3.2616 light years.]
▸ noun:  Initialism of Palestine Solidarity Campaign.
▸ noun:  Abbreviation of Point St. Charles. (Pointe Saint-Charles)
▸ noun:  (Canada) Initialism of Public Service of Canada.
▸ noun:  (medicine) Initialism of primary sclerosing cholangitis.
▸ noun:  (meteorology) Initialism of polar stratospheric cloud. [(meteorology) A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother-of-pearl as they shine in vivid colours, known as irisation]
▸ noun:  Initialism of Putonghua Proficiency Test, standardized test of Standard Mandarin Chinese proficiency for native speakers



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