ra·​di·​opaque ˌrā-dē-ō-ˈpāk How to pronounce radiopaque (audio)
: being opaque to various forms of radiation (such as X-rays)

Examples of radiopaque in a Sentence

Recent Examples on the Web During a barium study, the turtles ingested a radiopaque material that illuminated their separate digestive tracks on an X-ray. Cheryl Maguire, Discover Magazine, 14 Feb. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'radiopaque.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1917, in the meaning defined above

Time Traveler
The first known use of radiopaque was in 1917

Dictionary Entries Near radiopaque

Cite this Entry

“Radiopaque.” Dictionary, Merriam-Webster, Accessed 21 Jul. 2024.

Medical Definition


ra·​di·​opaque -ō-ˈpāk How to pronounce radiopaque (audio)
: being opaque to radiation and especially X-rays
radiopaque dyes
compare radiolucent
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