American Heritage Dictionary
Century Dictionary
(1)
GNU Webster's 1913
(1)
WordNet
(2)
Elsewhere on the web
A patient suffering under this situation may even feel minor trauma causing irritation and nerve root impingement which indirectly results into back ache.— Find Free Articles - ArticlesBase
M4 / M4A1 - type direct-gas-impingement (DGI) carbine in 31 weeks without a single malfunction attributable to anything except bad ammunition or bad magazines, with a grand total of 9 malfunctions.— Defense Review
FERFRANS SOAR direct-gas-impingement (DGI) SBRs, since we put approximately 1500 rounds through them.— Defense Review
So the move - done wrong - can lead to shoulder impingement or worse, a tear in the rotator cuff.— WebMD Health
Though I own an AR, I don't like the AR direct-impingement design.— The Jawa Report

Century Dictionary (1)
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