x ray is a noun meaning "electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target". It carries 2 recorded senses.
electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
a radiogram made by exposing photographic film to X rays; used in medical diagnosis
Definitions, synonyms and semantic relations for x ray come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.