any of a class of organic compounds obtained by the reaction of phthalic anhydride with a phenol and used in dyes
Word Origin
C19: from phthal-, shortened form of naphthalene +-in
phthalein in Medicine
phthalein phthal·ein or phthal·eine (thāl'ēn', thāl'ē-ĭn, thā'lēn', thā'lē-ĭn) n. Any of a group of chemical compounds formed by a reaction of phthalic anhydride with a phenol, from which certain synthetic dyes are derived.
phthalein in Science
phthalein
(thāl'ēn', thā'lēn', fthāl'-) Any of a group of chemical compounds formed by a reaction of phthalic anhydride with a phenol. They are used to derive certain synthetic dyes.