Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
x-radiation 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
obtaining images by the use of X rays
Definitions, synonyms and semantic relations for x-radiation come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.