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Mesabi Range

American  
[muh-sah-bee] / məˈsɑ bi /

noun

  1. a range of low hills in NE Minnesota, noted for major iron-ore deposits mined by the open-pit method.

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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.