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A religion that does not have a central authority but shares ideas and cooperates informally.
a social class separated from others by distinctions of hereditary rank or profession or wealth
the branch of astrophysics that studies the origin and evolution and structure of the universe
a poor densely populated city district occupied by a minority ethnic group linked together by economic hardship and social restrictions
either of the two times of the year when the sun is at its greatest distance from the celestial equator
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