ack-ack

Noun
  1. is a type of: gun - a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)
    subtypes: bofors gun - an automatic double-barreled antiaircraft gun
    has: predictor - a computer for controlling antiaircraft fire that computes the position of an aircraft at the instant of a shell's arrival
    same as: ack-ack gun, antiaircraft, antiaircraft gun, flack, flak, pom-pom

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