Penetration-aid
noun, Military.
1.
a device or tactic, as the use of chaff or decoys or the maintaining of a low flight level, that helps an aircraft or missile to enter hostile air space.
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[pen-i-trey-tiv] /ˈpɛn ɪˌtreɪ tɪv/ adjective 1. tending to ; piercing. 2. acute; keen.
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