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Title Index: 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 0-9

X:  A
X (in linguistics)
X Prize Foundation (organization, United States)
X ray (in electricity, medicine, physics)
X-ray astronomy (in astrophysics)
X-ray crystallography (branch of crystallography)
Xalapa (city, Mexico)
Xánthi (city, Greece)
Xanthus (ancient city, Turkey)
Xe (symbol)
Xenia (city, Ohio)
xenon (element)
Xi (river, China)
Xi'an (city, China)
Xiamen (city, China)
Xiang (river, China)
Xiangfan (city, China)
Xiangtan (city, China)
Xigazê (city, Tibet)
Xikang (former province, China)
Ximenes (of Spain)
Xingu (river, Brazil)
Xinhui (city, China)
Xining (city, China)
Xinjiang (region, China)
Xinyang (city, China)
Xochimilco (city, Mexico)
Xuzhou (city, China)
xylene (in chemistry)
XYZ Affair (historical event, United States/France)