xemen.[鸟]北极鸥Xen.[化]元素氙(xenon)的符号Xenortholitha ignotatan.迷黑点尺蛾xeromorphic vegetation旱生植被xeropulmonary diarrhea肺燥作泻Xenococcus cladopharaen.附枝异球藻xenohistocompatibility异种组织相容性, 异种组织适合性Xenortholitha corioidean.革黑点尺蛾xenograft bioprosthesis异种移植生物假体xerosis parenchymatosus[医] 实质性结膜干燥(沙眼引起结膜瘢痕及泪管闭塞所致)Xenorhabdus luminescens发光致病杆菌Xenopsylla brasiliensis[医] 巴西客蚤