R2-D2

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English

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Phalanx CIWS aboard USS Jason Dunham.

Etymology

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From the name of a similar-looking robot character in the film Star Wars.

Noun

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R2-D2 (plural R2-D2s)

  1. (military, slang) The Phalanx CIWS, an automated gun-based close-in weapon system to defend military watercraft against incoming threats such as aircraft, missiles, and small boats.
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