xylophoneEnglishOxford New American Dictionaryxylophone /ˈzīləˌfōn, ˈzaɪləˌfoʊn / ▸ noun a musical instrument played by striking a row of wooden bars of graduated length with one or more small wooden or plastic mallets. – DERIVATIVES xylophonic /ˌzīləˈfänik/ adjective,xylophonist /ˈzīləˌfōnəst, ˈzaɪləˌfoʊnəst /– ORIGIN mid 19th century : from xylo- ‘of wood’ + -phone.