tram·po·line 
(trămpə-lēn′, -lĭn)
(trămpə-lēn′, -lĭn)n.
A strong, taut fabric attached with springs to a metal frame and used for gymnastic springing and tumbling.
[Spanish trampolín and Italian trampolino (Italian, from Spanish), from tràmpoli, stilts, of Germanic origin.]
trampo·lin′er, trampo·lin′ist n.