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Word of the Day Wednesday, June 10, 2026

occluder

/ɒkˈluːdər/ noun · British & US
Valid in UK
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What does occluder mean?

noun

A device or structure that blocks or obstructs something, such as light or radiation. An occluder may also refer to a person or thing that prevents or hinders something from happening.

Example

"The scientist used an occluder to block the light from entering the room."

Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.

Etymologically related

Synonyms for occluder

Antonyms of occluder

Rhymes with occluder