Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
radio-opacity is a noun meaning "opacity to X-rays or other radiation". It carries one recorded sense.
opacity to X-rays or other radiation
Definitions, synonyms and semantic relations for radio-opacity come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.