SPUI
n.— «To increase capacity and avoid such problems, engineers have created a variation on the diamond design known as a single-point urban interchange, or SPUI (pronounced spew-ee).» —“Planners say SPUI on Cloverleafs” by Michael Squires Las Vegas Review-Journal (Nev.) 2001, 2001. (source: Double-Tongued Dictionary)
Further reading
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Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...