radiolucent

1 of 2

adjective

ra·​dio·​lu·​cent ˌrā-dē-ō-ˈlü-sᵊnt How to pronounce radiolucent (audio)
: partly or wholly permeable to radiation
radiolucent tissues
radiolucency
ˌrā-dē-ō-ˈlü-sᵊn(t)-sē How to pronounce radiolucent (audio)
noun

radiolucence

2 of 2

noun

ra·​dio·​lu·​cence
¦rā-dē-ō¦lü-sᵊn(t)s
variants or radiolucency
¦rā-dē-ō¦lü-sᵊn(t)-sē How to pronounce radiolucence (audio)
plural radiolucences or radiolucencies
: the quality or state of being radiolucent

Word History

Etymology

Noun

radiolucence from radiolucent, after such pairs as English different : difference; radiolucency from radiolucent + -cy

First Known Use

Adjective

1917, in the meaning defined above

Time Traveler
The first known use of radiolucent was in 1917

Rhymes for radiolucent

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Browse Nearby Words

radiolucence
radiolucent
radioluminescence
See all Nearby Words

Cite this Entry

“Radiolucent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radiolucent. Accessed 16 Jun. 2026.

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Medical Definition

radiolucent

adjective
ra·​dio·​lu·​cent -ˈlüs-ᵊnt How to pronounce radiolucent (audio)
: partly or wholly permeable to radiation and especially X-rays compare radiopaque

More from Merriam-Webster on radiolucent

Nglish: Translation of radiolucent for Spanish Speakers

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