15-letter words containing x, r, a
- x-ray astronomy — the branch of astronomy that studies celestial objects by means of the x-rays emitted by them.
- x-ray diagnosis — diagnosis by means of an X-ray
- xenotransplants — Plural form of xenotransplant.
- xerographically — In a xerographic way; by xerography.
- xeroradiography — an x-ray utilizing a specially coated plate that allows a picture to be developed without the use of liquid chemicals.
- xylotypographic — involving or pertaining to xylotypography
- zermelo's axiom — axiom of choice.