Designed or treated to resist or prevent the effects of fog, moisture, or cloudy conditions, especially in contexts like optics or visibility.
A compound of 'fog' (from Old English 'fugol' meaning unclear/misty) and 'proof' (from Old French 'prover' meaning to test or approve). Modern compound formed in industrial/technical contexts.
During World War II, scientists developed fogproof coatings for military equipment and instruments because a single layer of moisture-condensed fog on a lens or scope could mean the difference between spotting an enemy or missing it entirely.
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