a dome-shaped device used to house a radar antenna.

1940–45; blend of radar and dome

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World English Dictionary
radome (ˈreɪdəʊm)
a protective housing for a radar antenna made from a material that is transparent to radio waves
[C20: ra(dar) + dome]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The refraction of the circularly symmetric radome varies as a function of elevation angle.
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