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dummy ['dʌmɪ] n
tech., mech.eng.	valomasis katodas
English thesaurus
dummy ['dʌmɪ] n
mil., abbr.	dmy; dum
mil., logist.	An imitation of a person, object or phenomenon, which is intended to deceive hostile surveillance or detection systems or mislead the adversary. (FRA)
USA	An imitation in any sense of a person, object, or phenomenon which is intended to deceive enemy surveillance devices or mislead enemy evaluation (JP 3-13.4)

dummy: 7 phrases in 3 subjects

Economy	1
Mathematics	5
Technology	1