X. X, the twenty-fourth letter of the English alphabet, has three sounds; a compound nonvocal sound (that of ks), as in wax; a compound vocal sound (that of gz), as in example; and, at the beginning of a word, a simple vocal sound (that of z), as in xanthic. See Guide to Pronunciation, // 217, 270, 271. X raysn. pl. Alt. of X-rays X-ray tube. A vacuum tube suitable for producing Rontgen rays. X-raysn. pl. The Rontgen rays; -- so called by their discoverer because of their enigmatical character. Xanthamiden. An amido derivative of xanthic acid obtained as a white crystalline substance, C2H5O.CS.NH2; -- called also xanthogen amide. Xanthaten. A salt of xanthic; a xanthogenate. Xanthelasman. See Xanthoma. Xanthiana. Of or pertaining to Xanthus, an ancient town on Asia Minor; -- applied especially to certain marbles found near that place, and now in the British Museum. Xanthica. Tending toward a yellow color, or to one of those colors, green being excepted, in which yellow is a constituent, as scarlet, orange, etc. Xanthica. Possessing, imparting, or producing a yellow color; as, xanthic acid. Xanthica. Of or pertaining to xanthic acid, or its compounds; xanthogenic. Xanthica. Of or pertaining to xanthin. Xanthiden. A compound or derivative of xanthogen. Xanthidiapl. of Xanthidium Xanthidiumn. A genus of minute unicellular algae of the desmids. These algae have a rounded shape and are armed with glochidiate or branched aculei. Several species occur in ditches, and others are found fossil in flint or hornstone.
Based on The Online Plain Text English Dictionary (OPTED) produced by Ralph S. Sutherland from the 1913 edition of Webster's Unabridged Dictionary