- Xe
- Xenarthra
- Xenicidae
- Xenicus
- Xenicus gilviventris
- xenogeneic
- xenogenesis
- xenograft
- xenolith
- xenon
- Xenophanes
- xenophobia
- xenophobic
- Xenophon
- Xenopodidae
- Xenopus
- Xenopus laevis
- Xenorhyncus
- Xenorhyncus asiaticus
- Xenosauridae
- Xenosaurus
- xenotime
- xenotransplant
- xenotransplantation
- xeranthemum
- Xeranthemum annuum
- xeric
- Xerobates
- xeroderma
- xeroderma pigmentosum
- xerodermia
- xerographic
- xerographic copier
- xerographic printer
- xerography
- xeroma
- xerophile
- xerophilous plant
- xerophthalmia
- xerophthalmus
- Xerophyllum
- Xerophyllum tenax
- xerophyte
- xerophytic
- xerophytic plant
- xeroradiography
- xerostomia
- xerotes
- xerox
- xerox copy
- Xerox machine
- Xerxes I
- Xerxes the Great
- Xestobium rufovillosum