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zipper
mastery UK /ˈzɪpə(ɹ)/ US /ˈzɪpɚ/nounverb
card 1 of 10 · context meaning
What does 'zipper' mean in this sentence?
They would handle all the night combat air patrols, the night hecklers who would go over the enemy airfields, and we formed a new little gimmick called 'zippers' to help close that gap between the time the daylight strikes left the target and darkness.