a radio-astronomy and ionospheric observatory near Arecibo, Puerto Rico: site of one of the world's largest single-dish radio telescopes, 1000 feet (305 meters) in diameter.
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British Dictionary definitions for arecibo observatory
/ (Spanish ɑreˈθiβo) /
an observatory in Puerto Rico at which the world's largest dish radio telescope (diameter 305 m) is situated. It is operated by the National Astronomy and Ionosphere Center
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012