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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.
xylophone a percussion instrument having a series of graduated metal or wooden bars that sound the notes of the chromatic scale when struck with small wooden mallets.
xylose a white crystalline sugar used in diabetic diets and for dyeing and tanning.
-y1 full of; made of; characterized by. [4 definitions]
-y2 condition; quality. [4 definitions]
Y symbol of the chemical element yttrium.
y the twenty-fifth letter of the English alphabet. [4 definitions]
yacht any of various sailing or motor-driven vessels used for private cruises, racing, or the like. [2 definitions]
yachting the act, practice, or sport of sailing, cruising, or racing in a yacht.
yachtsman a man who owns or navigates a yacht.
yachtswoman a woman who owns or navigates a yacht.
yah used to express defiance, scorn, or ridicule.
Yahoo in the eighteenth-century novel Gulliver's Travels by Jonathan Swift, one of a race of brutish, degraded, humanlike creatures. [3 definitions]
Yahweh a rendering of the pronunciation of the letters YHVH, used in Hebrew to represent the unutterable name of God; Jehovah.
yak1 a heavily built, long-haired, wild or domesticated ox of Tibet and Central Asia.