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• s  (used especially of machinery) not protected by a shield

• Two scientists at the University of Genoa, Italy, noted that the rays coming from unshielded quartz-halogen lamps can induce mutations in the DNA of bacteria.
• Most important were two Geiger tubes, one of them unshielded, the other wrapped in sheet lead about in.
• Dumbo is separated from his mother and left unshielded from the unrelenting attacks.

News & Articles

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• Deeper teacher evaluations are coming, but how much should student performance count?
  In Missouri, a showdown is mounting over a proposed constitutional amendment that would radically change the way teachers are evaluated. At the crux of it is a question: Should teachers prove themselves every year predominantly by their students’ test scores, unshielded by tenure?
  June 22, 2013 - The Kansas City Star