Thus the three-story administration building features a half-acre Great Workroom for clerical employees that is distinguished by an arboreal canopy created by a grid of "dendriform" columns and interspersed skylights.    From Wordnik.com.  [Wright's House of Wax] Reference

Great Room, "for clerical employees that is distinguished by an arboreal canopy created by a grid of 'dendriform' columns interspersed skylights.    From Wordnik.com.  [Reveries: Cool News of the Day - marketing people, insights, innovation, ideas] Reference