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xeno- strange; foreign.
xenon a chemical element of the inert gas group that has fifty-four protons in each nucleus and that is used as the atmosphere in fluorescent lamps because it glows with a blue light when excited by electricity. (symbol: Xe)
xenophilia a liking for foreigners or strangers or for foreign or strange things.
xenophobe a person who fears or detests foreigners, strangers, or anything that is foreign or strange.
xenophobia excessive or unreasoning fear or hatred of foreign people or things.
xero- dry.
xerography a copying process in which the original image is reproduced on paper or the like with a resinous powder by the action of light on an electrically charged surface.
xerophilous capable of surviving or flourishing in esp. hot arid regions.
xerophyte a plant that can grow in a very dry or desert environment, and that often has fleshy parts and hairs or thorns, such as an agave or cactus.
Xerox trademark for a process of copying printed material by xerography, or the machine used for this process. [3 definitions]
X Games a competitive sporting event with winter and summer versions, featuring a variety of extreme sports, held every few years in different cities.
Xhosa a member of one of the Bantu peoples living mainly in Cape Province, South Africa. [2 definitions]
xi the name of the fourteenth letter of the Greek alphabet.
Xing abbreviation of "crossing."
XL abbreviation of "extra large."
Xmas abbreviation of "Christmas."
x-radiation application of or exposure to x-rays, esp. as treatment for disease. [2 definitions]
X-rated of a film, performance, or the like, formerly given, or deserving of, a rating of X because of its explicit sexual activity, obscenity, or violence. (see X.)
x-ray a beam of high-energy photons that is able to ionize gases and pass through dense solids. [4 definitions]
xylem a plant's woody tissue that carries water and mineral salts.
xylo- wood.