| X {adj} /z/ | :: equis |
| Xanthi {prop} (city in Greece) | :: Xánthi |
| xanthine {n} (group of alkaloids, including caffeine) | :: xantina {f} |
| xanthous {adj} /ˈzæn.θəs/ (yellow-brown) | :: ocre |
| Xavier {prop} /ˈzeɪ.vjɚ/ (male given name) | :: Javier |
| Xbox {n} /ˈɛks bɒks/ (video game console manufactured and distributed by Microsoft) | :: Xbox |
| xebec {n} /ˈziːbɛk/ (transport ship) | :: jabeque {m} |
| xenia {n} (ancient concept of hospitality) | :: xenía |
| xenocide {n} /ˈzɛnəsaɪd/ (genocide of entire alien species) | :: xenocidio {m} |
| Xenocrates {prop} (philosopher) | :: Jenócrates, Xenócrates |
| xenoglossy {n} (glossolalia) SEE: glossolalia | :: |
| xenoglossy {n} /ˌziːnəˈɡlɒsi/ (knowledge of a language one has never learned) | :: xenoglosia {f} |
| xenohormone {n} (any of a group of natural and artificial compounds showing hormone-like properties) | :: xenohormona {f} |
| xenolith {n} (geology: any piece of rock having a different origin to that of the igneous rock in which it is found) | :: xenolito {m} |
| xenon {n} /zinən/ (chemical element) | :: xenón {m} |
| Xenophanes {prop} /zɛˈnɒfəniːz/ (a Greek philosopher and a poet) | :: Jenófanes |
| xenophobe {n} /ˈzinəfoʊb/ (hater of foreigners) | :: xenófobo {m}, xenófoba {f} |
| xenophobia {n} /zinəˈfoʊbiə/ (a pathological fear or hatred of strangers or foreigners) | :: xenofobia {f} |
| xenophobic {n} (xenophobe) SEE: xenophobe | :: |
| xenophobic {adj} (exhibiting or characterised by xenophobia) | :: xenófobo {m} |
| Xenophon {prop} (historian and philosopher) | :: Jenofonte |
| xenotransplantation {n} (transplantation between species) | :: xenotrasplante {m} |
| xero- {prefix} (dryness) | :: xero- |
| xerography {n} (photocopying process) | :: xerografía {f} |
| xerophthalmia {n} (condition) | :: xeroftalmia {f} |
| xerophthalmic {adj} (of or pertaining to xerophthalmia) | :: xeroftálmico |
| xerostomia {n} (dry mouth) SEE: dry mouth | :: |
| xerox {v} /ˈziː(ə)ɹ.ɑks/ (to make photocopies) | :: fotocopiar |
| Xerxes {prop} /ˈzɝksiːz/ (Xerxes I of Persia) | :: Jerjes I {m} |
| Xerxes {prop} (Xerxes II of Persia) | :: Jerjes II {m} |
| Xhosa {n} /ˈkoʊ.sə/ (Xhosa language) | :: xhosa {m} |
| xi {n} /ksaɪ/ (Greek letter) | :: xi {f} |
| Xiamen {prop} /ʃjɑːˈmɛn/ (a sub-provincial city in southeastern China) | :: Xiamen |
| Xianggang {prop} (Hong Kong) SEE: Hong Kong | :: |
| Xibalba {prop} /ʃiˈbɑːlbə/ (the underworld in Mayan mythology) | :: Xibalbá {f} |
| Xinjiang {prop} /ˈʃɪnˈdʒjæŋ/ (autonomous region of China) | :: Xinjiang {m} |
| xiphias {n} (xiphias) SEE: swordfish | :: |
| xiphoid {adj} /ˈzɪfɔɪd/ (of or relating to the xiphisternum) | :: xifoide |
| Xizang {prop} (Tibet) SEE: Tibet | :: |
| Xochapa {prop} | :: Xochapa |
| xor {n} /ɛks ˈɔː(ɹ)/ (exclusive OR) | :: o exclusivo |
| XO sauce {n} (sauce) | :: salsa XO {f} |
| X-ray {n} /ˈɛks ˌɹeɪ/ (short wavelength electromagnetic radiation) | :: rayo X {m} |
| X-ray {n} (photograph made with X-rays) | :: radiografía {f} |
| X-ray {v} (to take a radiograph of) | :: radiografiar |
| X-ray crystallography {n} (the analytical technique) | :: cristalografía de rayos X {f} |
| X-trainer {n} (elliptical trainer) SEE: elliptical trainer | :: |
| Xueta {n} (descendant of Majorcan Jews) | :: chueta {m} {f} |
| xylan {n} (biochemistry: a polysaccharide consisting of xylose residues) | :: xilano {m} |
| xylem {n} /ˈzaɪ.ləm/ (botany: vascular tissue in land plants) | :: xilema {m} |
| xylene {n} /ˈzaɪliːn/ (di-methyl-benzene) | :: xileno {m} |
| xylitol {n} (an alcohol) | :: xilitol {m} |
| xylocaine {n} (lidocaine) SEE: lidocaine | :: |
| xylograph {n} (engraving in wood) SEE: woodcut | :: |
| xylograph {n} (print taken from an engraving in wood) SEE: woodcut | :: |
| xylography {n} (art of making xylographs) SEE: woodcut | :: |
| xylophone {n} /ˈzaɪ.lə.ˌfəʊn/ (musical instrument) | :: xilófono {m} |
| xylophonist {n} (xylophone player) | :: xilofonista {f} |
| xylose {n} (wood sugar) | :: xilosa {f} |
| xylulose {n} (ketopentose) | :: xilulosa {f} |