Dust Off n. the military program of medical evacuation and transportation by air; an instance of such travel; a helicopter used for this purpose. Also dust-off. Etymological Note: The origin of this term is accurately described in the 1982 citation, which refers to events that occurred in 1963. The acronym given in the 2007 citation is a backronym, one created to match the existing term and not the original acronym or origin of “Dust-Off.” (source: Double-Tongued Dictionary)

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