X开头的英语单词有：Xmas、xylophone、xylitol、xerophyte、xalloy；
1、Xmas ；读音：英 ['krɪsməs] 美 ['krɪsməs] ；n. 圣诞节；A week intervenes between Xmas and New Year's Day.；圣诞节与元旦之间相距一周。；
2、xylophone ；读音：英 ['zaɪləfəʊn] 美 ['zaɪləfoʊn] ；n. 木琴；Donald is playing the xylophone.；唐老鸭在敲打木琴。；
3、xylitol ；读音：英 ['zaɪlɪtɒl] 美 ['zaɪlətɒl] ；n. [化]木糖醇；Fermentative production of xylitol has became a promising process.；介绍了木糖醇的生产方法和生产工艺。；
4、xerophyte ；读音：英 ['zɪərəfaɪt] 美 ['zɪrəˌfaɪt] ；n. 旱生植物；A xerophyte is a plant which is able to survive in an ecosystem with little available water or moisture.；旱生植物可以在水分极少或湿度极小的生态环境中生存。；
5、xalloy ；n.铜铝合金；The Relation between Xalloy Car Body and Energy Saving；车体铝合金化与节约能源的关系
