| ANTHRAXES | • anthraxes n. Plural of anthrax. • ANTHRAX n. a deadly disease of sheep or cattle. |
| BOXTHORNS | • boxthorns n. Plural of boxthorn. • BOXTHORN n. a thorny shrub with red berries. |
| EXANTHEMS | • exanthems n. Plural of exanthem. • EXANTHEM n. a skin eruption, esp. accompanied by fever, also EXANTHEMA. |
| EXHALANTS | • exhalants n. Plural of exhalant. • EXHALANT n. a vessel that emits vapour or liquid, also EXHALENT. |
| EXHALENTS | • exhalents n. Plural of exhalent. • EXHALENT n. a vessel that emits vapour or liquid, also EXHALANT. |
| NARTHEXES | • narthexes n. Plural of narthex. • NARTHEX n. (Greek) a small entrance or porch to a church. |
| SIXTEENTH | • sixteenth adj. The ordinal form of the number sixteen. • sixteenth n. One of sixteen equal parts of a whole. • SIXTEENTH adj. number sixteen in sequence. |
| THYROXINS | • thyroxins n. Plural of thyroxin. • THYROXIN n. an iodine compound, a hormone forming the active principle of the thyroid gland, also THYROXINE. |
| XANTHATES | • xanthates n. Plural of xanthate. • XANTHATE n. a salt of xanthic acid. |
| XANTHEINS | • xantheins n. Plural of xanthein. • XANTHEIN n. a soluble yellow colouring. |
| XANTHENES | • xanthenes n. Plural of xanthene. • XANTHENE n. a white crystalline compound of carbon, hydrogen and oxygen, from which dyestuffs are derived. |
| XANTHINES | • xanthines n. Plural of xanthine. • XANTHINE n. a white substance, structurally related to uric acid, found in muscle tissue, the liver and other organs, also XANTHIN. |
| XANTHISMS | • XANTHISM n. a condition of skin, fur or feathers in which yellow coloration predominates. |
| XANTHOMAS | • xanthomas n. Plural of xanthoma. • XANTHOMA n. a skin disease marked by the development of irregular yellowish patches upon the skin, esp. upon the eyelids. |
| XANTHONES | • xanthones n. Plural of xanthone. • XANTHONE n. a ketone analogue of xanthene which forms the basis of various natural pigments. |
| XENOLITHS | • xenoliths n. Plural of xenolith. • XENOLITH n. (Greek) a rock fragment foreign to the igneous mass in which it occurs. |