Garnier limb

Garnier limb
 n.— «But that was before an engineering breakthrough developed by conference participants, the so-called Garnier Limb, allowed treehouses greater stability and longer life, and before a spate of how-to and coffee-table books helped popularize them. Within a few years, elaborate treehouses, many costing upwards of $100,000, were becoming almost faddish in the United States as well as in Japan and France.» —“Setting up housekeeping in the trees” by Elaine Louie International Herald Tribune (Paris, France) Apr. 12, 2007. (source: Double-Tongued Dictionary)