Dictionary

fluorescein

noun fluo·res·ce·in \-ˈre-sē-ən\

Definition of FLUORESCEIN

:  a yellow or red crystalline dye C20H12O5 with a bright yellow-green fluorescence in alkaline solution

First Known Use of FLUORESCEIN

1871
Medical Dictionary

fluorescein

noun flu·o·res·ce·in \-ˈes-ē-ən\

Medical Definition of FLUORESCEIN

:  a yellow or red crystalline dye C20H12O5 with a bright yellow-green fluorescence in alkaline solution that is used as the sodium salt as an aid in diagnosis (as of lesions and foreign bodies in the cornea or of brain tumors)

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