rhodamine
noun
rho·da·mine
ˈrō-də-ˌmēn 
often capitalized
: any of a group of yellowish-red to blue fluorescent dyes
especially
: a brilliant bluish-red dye made by fusing an amino derivative of phenol with phthalic anhydride and used especially in coloring paper and as a biological stain
Examples of rhodamine in a Sentence
Recent Examples on the Web
The alkaline substance will be dispersed over four to 12 hours off the back of one of the research vessels, along with the nontoxic fluorescent red water tracer dye called rhodamine.
—
ArsTechnica, 11 Aug. 2025
Crews started dumping the rhodamine dye into the water Monday and will complete the study by Friday, according to a news release.
—Tribune News Service, The Mercury News, 29 Aug. 2024
The dye is nontoxic rhodamine that is safe for use in drinking water and salt water.
—Kristina Davis, San Diego Union-Tribune, 3 Dec. 2021
In the photos on this page, researchers with David Kaplan’s Watershed Ecology Lab at the University of Florida used non-toxic rhodamine WT fluorescent dye as a tracer.
—Jennifer Adler, National Geographic, 29 Mar. 2017
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ArsTechnica, 11 Aug. 2025
Crews started dumping the rhodamine dye into the water Monday and will complete the study by Friday, according to a news release.
—Tribune News Service, The Mercury News, 29 Aug. 2024
The dye is nontoxic rhodamine that is safe for use in drinking water and salt water.
—Kristina Davis, San Diego Union-Tribune, 3 Dec. 2021
In the photos on this page, researchers with David Kaplan’s Watershed Ecology Lab at the University of Florida used non-toxic rhodamine WT fluorescent dye as a tracer.
—Jennifer Adler, National Geographic, 29 Mar. 2017
Cite this Entry
“Rhodamine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/rhodamine. Accessed 4 Nov. 2025.
Copy CitationMedical Definition
rhodamine
noun
rho·da·mine
ˈrōd-ə-ˌmēn
: any of a group of yellowish red to blue fluorescent dyes
especially
: rhodamine b
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