411 REFERENCE · Wiktionary
R2-D2
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
From the name of a similar-looking robot character in the film Star Wars.
Noun
en 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.
en eponyms