Word.ws English Dictionary

radiopaque

Syllables: ra·di·o·paqueUK/ˌɹeɪ̯.diː.əʊ̯ˈpeɪ̯k/US/ˌɹeɪ̯.di.oʊ̯ˈpeɪ̯k/

radiopaque adjective: impenetrable to X-rays and other radiation.

Adjective

radiopaque (comparative more radiopaque, superlative most radiopaque)

  1. Impenetrable to X-rays and other radiation.
    • We may coin the word ‘radiopaque’, and it would definitely mean ‘impervious to the X-ray’.[…]. From radiopaque we would likewise have the useful term radiopacity.[1917, R. Ottolengui, Dental Items of Interest, volume 39, quoted in OED, Dental Items of Interest Publishing Company, page 143
    Antonyms:
    radiolucent

Antonyms of radiopaque

Forms of radiopaque

comparativemore radiopaque
superlativemost radiopaque

Origin of radiopaque

From radi- (staff) + opaque. First attested in 1917.

Words formed from radiopaque

Words that rhyme with radiopaque

48 more rhymesFewer rhymes

Questions about radiopaque

What does radiopaque mean?
Radiopaque means impenetrable to X-rays and other radiation.
What part of speech is radiopaque?
Radiopaque is an adjective.
How do you pronounce radiopaque?
Radiopaque is pronounced /ˌɹeɪ̯.diː.əʊ̯ˈpeɪ̯k/ (UK).

Words near radiopaque in the dictionary

  1. radiopagers
  2. radiopaging
  3. radiopalladium
  4. radiopalmar
  5. radiopanspermia
  6. radiopaque
  7. radioparticle
  8. radioparticles
  9. radiopasteurization
  10. radiopasteurize
  11. radiopasteurized

Source and license

Adapted from Wiktionary: radiopaque (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “radiopaque.” Word.ws, https://word.ws/radiopaque. Based on Wiktionary, CC BY-SA 4.0.