phenolphthalein

(redirected from Phynolthalene)
Also found in: Thesaurus, Medical, Encyclopedia.

phe·nol·phthal·ein

 (fē′nōl-thăl′ēn′, -thăl′ē-ĭn, -thā′lēn′, -thā′lē-ĭn)
n.
A white or pale yellow crystalline powder, C20H14O4, used as an acid-base indicator, in making dyes, and formerly in medicine as an over-the-counter laxative.

phenolphthalein

(ˌfiːnɒlˈθeɪliːn; -lɪɪn; -ˈθæl-)
n
(Chemistry) a colourless crystalline compound used in medicine as a laxative and in chemistry as an indicator. Formula: C20H14O4

phe•nol•phthal•ein

(ˌfi nɔlˈθæl in, -i ɪn, -ˈfθæl-, -nɒl-)

n.
a white, crystalline compound, C20H14O4, used as an indicator in acid-base titration and as a laxative.
[1870–75]

phe·nol·phthal·ein

(fē′nōl-thăl′ēn′)
A white or pale-yellow, crystalline powder used as an indicator for acid and basic solutions. It is also used as a laxative and in making dyes.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.phenolphthalein - a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8
laxative - a mild cathartic
acid-base indicator - an indicator that changes color on going from acidic to basic solutions