xiphias (n.)youdaoicibaDictYouDict[xiphias 词源字典]
1660s, genus of swordfish, from Greek xiphias "swordfish," from xiphos "a sword" (see xiphoid). Related: Xiphioid.[xiphias etymology, xiphias origin, 英语词源]
xiphoid (adj.)youdaoicibaDictYouDict
"sword-shaped," 1746, from Greek xiphos "a sword," of unknown origin (Klein suggests a Semitic source and compares Hebrew sayif, Arabic sayf) + -oid.
Xmas (n.)youdaoicibaDictYouDict
"Christmas," 1551, X'temmas, wherein the X is an abbreviation for Christ in Christmas, English letter X being identical in form (but not sound signification) to Greek chi, the first letter of Greek Christos "Christ" (see Christ). The earlier way to abbreviate the word in English was Xp- or Xr- (corresponding to the "Chr-" in Greek Χριστος), and the form Xres mæsse for "Christmas" appears in the "Anglo-Saxon Chronicle" (c. 1100).
xylem (n.)youdaoicibaDictYouDict
"woody tissue in higher plants," 1875, from German Xylem, coined from Greek xylon "wood" (see xylo-).
xylene (n.)youdaoicibaDictYouDict
1851, from Greek xylon "wood" (see xylo-) + -ene.
before vowels xyl-, word forming element meaning "wood," from comb. form of Greek xylon "wood cut and ready for use, firewood, timber; piece of wood; stocks, a plank, beam, or bench," in New Testament, "the Cross," of unknown origin.
xylophagous (adj.)youdaoicibaDictYouDict
1842, from Latinized form of Greek xylophagos "wood-eating;" see xylo- + -phagous.
xylophone (n.)youdaoicibaDictYouDict
1866, coined from Greek xylon "wood" (see xylo-) + phone "a sound," from PIE root *bha- (2) "to speak, tell, say" (see fame (n.)).
xyster (n.)youdaoicibaDictYouDict
"surgical instrument for scraping bones," 1680s, from Greek xyster "a graving tool," from xyein "to scrape," from PIE root *kes- (1) "to scrape."
"The lowest part of the sternum; the xiphoid process", Mid 19th century: from Greek xiphos 'sword' + sternum.
"A yellow or brown carotenoid plant pigment which causes the autumn colours of leaves", Mid 19th century: from Greek xanthos 'yellow' + phullon 'leaf'.
"An irregular yellow patch or nodule on the skin, caused by deposition of lipids", Mid 19th century: from Greek xanthos 'yellow' + -oma.
"(Chiefly in science fiction) the scientific study of alien biology, cultures, etc", 1950s: from Greek xenos 'stranger, foreigner', (adjective) 'strange'.
"A crystalline compound found in blood and urine which is an intermediate in the metabolic breakdown of nucleic acids to uric acid", Mid 19th century: from xanthic + -ine4.