hypar
n.— «Saturday, June 9, Cleveland offered members of ITSA an opportunity to examine a model of a hyperbolic paraboloid, which is sometimes called a hypar, by coming to Spring Valley to see some of the alternative building methods in the southeastern Minnesota area.» —“Alternative building methods on display in area” by Mary Whalen Spring Valley Tribune (Minnesota) June 20, 2007. (source: Double-Tongued Dictionary)