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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Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?
Origin of penetration aid
First recorded in 1965–70
Words nearby penetration aid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020