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cardinal point |
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cardinal point [′kärd·nəl ¦pȯint] (geodesy) Any of the four principal directions: north, east, south, or west of a compass. (optics) Any one of six points in an optical system, namely, the two principal points, two nodal points, and two focal points. Also known as Gauss point. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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