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ACROSS
1)  revolve quickly and repeatedly around one's own axis
2)  a medicine or therapy that ____s disease or relieve pain
3)  a mineral that contains metal that is valuable enough to be mined
4)  the small projection of a mammary gland


DOWN
1)  a native or inhabitant of ____land
2)  free of extraneous elements of any kind
3)  the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
4)  a structure in which animals lay eggs or give birth to their young

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spun
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