What is the meaning of Thionoline?

(n.) A beautiful fluorescent crystalline substance, intermediate in composition between thionol and thionine.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). Thionoline. Retrieved September 21, 2026, from http://smartdefine.org/thionoline/definitions/2072132
ChicagoWebster's. 2011. "Thionoline" http://smartdefine.org/thionoline/definitions/2072132 (accessed September 21, 2026).
HarvardWebster's 2011, Thionoline, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/thionoline/definitions/2072132>.
MLAWebster's. "Thionoline" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/thionoline/definitions/2072132>