A B C D E F G H I J K L M N O P Q R S T U V W X Y Z X x X chromosome X Recommendations X Window System X'mas Flower x-axis X-certificate X-chromosome x-coordinate X-disease x-div. x-high x-int. x-radiation X-rated x-ray x-ray therapy X-shaped recovery x. X.25 X.400 X.500 X/Open Xanadu xanth- xanthate xanthein xanthene xanthic xanthic acid xanthin xanthine Xanthippe xantho- xanthocarpous xanthochroid xanthochroism xanthodont xanthogenate xanthoma xanthomelanous xanthone xanthophyll xanthoprotein 輸入字首瀏覽：
