Gal'le·ïn noun [ Pyro gall ol + phthal eïn .] (Chemistry) A red crystalline dyestuff, obtained by heating together pyrogallic and phthalic acids. Found on http://www.encyclo.co.uk/webster/G/4
Type: Term Pronunciation: gal′ē-in Definitions: 1. Structurally related to fluorescein and used as an aniline dye indicator, turning rose red above pH 6.6, yellowish brown below pH 4. Synonyms: pyrogallolphthalein Found on http://www.medilexicon.com/medicaldictionary.php?t=35999