Parsec
[pahr-sek] /ˈpɑrˌsɛk/
noun, Astronomy.
1.
a unit of distance equal to that required to cause a of one of an arc, equivalent to 206,265 times the distance from the earth to the sun, or 3.26 light-years.
/ˈpɑːˌsɛk/
noun
1.
a unit of astronomical distance equal to the distance from earth at which stellar parallax would be 1 second of arc; equivalent to 3.0857 × 1016 m or 3.262 light years
n.
interstellar distance measure, 1913, from first elements of parallax second. It is the distance at which an object has parallax (viewed from Earth) of one second of arc, or about 3.26 light-years.
parsec
(pär’sěk’)
A unit of astronomical length equal to 3.26 light-years. It is based on the distance from Earth at which a star would have a parallax of one second of arc. Its metric equivalent is about 30.8 trillion km (19.1 trillion mi). It is used in measuring distances in interstellar and intergalactic space. The closest star to Earth, Alpha Centauri, is about 1.3 parsecs away. Compare astronomical unit, light-year.
language
An extensible language with PL/I-like syntax, derived from PROTEUS.
[“PARSEC User’s Manual”, Bolt Beranek & Newman, Dec 1972].
(2009-06-26)
parallax second
Read Also:
- Parsee
[pahr-see, pahr-see] /ˈpɑr si, pɑrˈsi/ noun 1. an Indian Zoroastrian descended from Persian Zoroastrians who went to India in the 7th and 8th centuries to escape Muslim persecution. 2. the Middle Persian dialect of the Parsee scriptures. /ˈpɑːsiː/ noun 1. an adherent of a monotheistic religion of Zoroastrian origin, the practitioners of which were driven […]
- Parseeism
[par-see-iz-uh m, pahr-see-iz-uh m] /ˈpær siˌɪz əm, pɑrˈsi ɪz əm/ noun 1. the religion and customs of the .
- Parser
[pahrs, pahrz] /pɑrs, pɑrz/ verb (used with object), parsed, parsing. 1. to analyze (a sentence) in terms of grammatical constituents, identifying the parts of speech, syntactic relations, etc. 2. to describe (a word in a sentence) grammatically, identifying the part of speech, inflectional form, syntactic function, etc. 3. to analyze (something, as a speech or […]
- Parser generator
A program which takes a formal description of a grammar (e.g. in BNF) and outputs source code for a parser which will recognise valid strings obeying that grammar and perform associated actions. Unix’s yacc is a well known example.
- Pars granulosa
pars granulosa pars gran·u·lo·sa (grān’yə-lō’sə) n. The granular and filamentous part of the nucleolonema.