DEW line

[doo, dyoo]
a 3000-mile (4800–km)–long network of radar stations north of the Arctic Circle, maintained by the U.S. and Canada for providing advance warning of the approach of hostile planes, missiles, etc.

1955–60; D(istant) E(arly) W(arning) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
DEW line (djuː)
n acronym for
distant early warning line, a network of radar stations situated mainly in Arctic regions to give early warning of aircraft or missile attack on North America

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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