moondust
n.— «They must choose between snatching an hour of sleep or using the precious time to clean their weapons, which often jam from the fine sand—which soldiers call “moondust”—that is swept up by incessant winds, penetrating even the tiniest crevices.» —“Next stop: Combat” by Lauren McSherry San Bernardino County Sun (California) May 10, 20080. (source: Double-Tongued Dictionary)