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Word of the Day Tuesday, June 9, 2026

fluorescein

/ˈflʊərɛskiːn/ noun · British & US
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What does fluorescein mean?

noun

A yellowish-white fluorescent dye used in medicine, photography, and other applications. It is also known as urobilin.

Example

"The doctor injected fluorescein into the patient's eye to examine the retina."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for fluorescein

Rhymes with fluorescein

Etymologically related