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ACROSS
1)  a circular segment of a curve
2)  a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
3)  a signal transmitted along a narrow path; guides airplane pilots in darkness or bad weather
4)  a member of an indigenous nomadic people living in northern scandinavia and herding reindeer


DOWN
1)  the bill in a restaurant
2)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
3)  a large quantity of written matter
4)  a language unit by which a person or thing is known

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