[awr-thoh-fos-fawr-ik, -for-, awr-] /ˈɔr θoʊ fɒsˈfɔr ɪk, -ˈfɒr-, ˌɔr-/
a colorless, crystalline solid, H 3 PO 4 , the tribasic acid of pentavalent phosphorus: used chiefly in fertilizers, as a source of phosphorus salts, and in soft drinks as an acidulant and flavoring agent.
a colourless soluble solid tribasic acid used in the manufacture of fertilizers and soaps. Formula: H3PO4 Also called phosphoric acid
orthophosphoric acid or·tho·phos·phor·ic acid (ôr’thō-fŏs-fôr’ĭk)
See phosphoric acid.
[awr-thuh-fos-fer-uh s, awr-thoh-fos-fawr-uh s, -fohr-] /ˈɔr θəˈfɒs fər əs, ˌɔr θoʊ fɒsˈfɔr əs, -ˈfoʊr-/ noun, Chemistry. 1. a white to yellowish, crystalline, hygroscopic, water-soluble solid, H 3 PO 3 , used chiefly in the synthesis of phosphites. /ˌɔːθəʊˈfɒsfərəs/ noun 1. a white or yellowish hygroscopic crystalline dibasic acid. Formula: H3PO3 Also called phosphorous 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. […]
[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.
[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.