luminous Solutions Relating to visible light has 3 entries with similar clues 9-letter wordswatermarkIdentifying mark impressed faintly onto paper, visible when held against light10-letter wordswatermarksdesigns made in paper that are visible when held against the light16-letter wordsforked-lightningLightning that is visible in the form of a branching line across the sky
Solutions Relating to visible light has 3 entries with similar clues 9-letter wordswatermarkIdentifying mark impressed faintly onto paper, visible when held against light10-letter wordswatermarksdesigns made in paper that are visible when held against the light16-letter wordsforked-lightningLightning that is visible in the form of a branching line across the sky
