thi·​o·​nine ˈthī-ə-ˌnēn How to pronounce thionine (audio) -nən How to pronounce thionine (audio)
: a dark crystalline basic thiazine dye that is used chiefly as a biological stain

Dictionary Entries Near thionine

Cite this Entry

“Thionine.” Medical Dictionary, Merriam-Webster, Accessed 29 May. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!