rainbowing
 n.— «Work on the first of three Palm Islands (Jumeirah) began in 2001. A team of Dutch engineers were employed to create the Palm by using a technique called rainbowing—a vessel dredging sand from the seabed and spraying and piling it onto the desired area and into the requested shape.» —“Oil-rich Dubai redraws the atlas” by Matthew Knight CNN Nov. 14, 2006. (source: Double-Tongued Dictionary)

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