13-letter words containing h, o, a, x
- xanthochroous — light-skinned and fair-haired
- xerophthalmia — abnormal dryness of the eyeball characterized by conjunctivitis, caused by a deficiency of tears and attributed to a lack of vitamin A.
- xerophthalmic — Of or pertaining to xerophthalmia.
- xiphiplastron — the fourth lateral plate of a turtle's plastron
- xylographical — Xylographic.
- zooxanthellae — any of various symbiotic yellow-green or yellow–brown algae in the cytoplasm of certain radiolarians and marine invertebrates.