Orthophthalic-acid



[awr-thuh-thal-ik, -thuh f-thal-] /ˌɔr θəˈθæl ɪk, -θəfˈθæl-/

noun, Chemistry.
1.
See under (def 1).
noun
1.
Chemistry. any of three isomeric acids having the formula C 8 H 6 O 4 , especially the ortho isomer (orthophthalic acid) a colorless, crystalline, slightly water-soluble solid used chiefly in the manufacture of dyes, medicine, and perfume.
2.
.
3.
.
/ˈθælɪk; ˈfθæl-/
noun
1.
a soluble colourless crystalline acid used in the synthesis of dyes and perfumes; 1,2-benzenedicarboxylic acid. Formula: C6H4(COOH)2

phthalic acid n.
A colorless crystalline organic acid prepared from naphthalene and used in the synthesis of dyes and other organic compounds.
phthalic acid
(thāl’ĭk, fthāl’-)
A colorless, crystalline organic acid prepared from naphthalene and used in the synthesis of dyes, perfumes, and other organic compounds. Chemical formula: C8H6O4.

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  • Orthophyric

    [awr-thuh-fahy-rik] /ˌɔr θəˈfaɪ rɪk/ adjective, Petrography. 1. of or relating to a texture in which the groundmass is characterized by closely packed, short, quadrilateral crystals of feldspar larger than those in a trachytic groundmass.

  • Orthopnea

    [awr-thop-nee-uh, awr-thop-nee-uh, -thuh p-] /ɔrˈθɒp ni ə, ˌɔr θɒpˈni ə, -θəp-/ noun, Pathology. 1. difficult or painful breathing except in an erect sitting or standing position. orthopnea or·thop·ne·a (ôr’thŏp-nē’ə, ôr-thŏp’nē-ə) n. Discomfort in breathing that is relieved by sitting or standing in an erect position.



  • Orthopnoea

    [awr-thop-nee-uh, awr-thop-nee-uh, -thuh p-] /ɔrˈθɒp ni ə, ˌɔr θɒpˈni ə, -θəp-/ noun, Pathology. 1. difficult or painful breathing except in an erect sitting or standing position. orthopnea or·thop·ne·a (ôr’thŏp-nē’ə, ôr-thŏp’nē-ə) n. Discomfort in breathing that is relieved by sitting or standing in an erect position.

  • Orthopneic

    [awr-thop-nee-uh, awr-thop-nee-uh, -thuh p-] /ɔrˈθɒp ni ə, ˌɔr θɒpˈni ə, -θəp-/ noun, Pathology. 1. difficult or painful breathing except in an erect sitting or standing position. orthopneic or·thop·ne·ic (ôr’thŏp-nē’ĭk) adj. Relating to or suffering from orthopnea. orthopnea or·thop·ne·a (ôr’thŏp-nē’ə, ôr-thŏp’nē-ə) n. Discomfort in breathing that is relieved by sitting or standing in an erect position.



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