Phosphorous
[fos-fer-uh s, fos-fawr-uh s, -fohr-] /ˈfɒs fər əs, fɒsˈfɔr əs, -ˈfoʊr-/
adjective, Chemistry.
1.
containing trivalent .
/ˈfɒsfərəs/
adjective
1.
of or containing phosphorus in the trivalent state
adj.
1777, “phosphorescent,” from phosphorus + -ous. The chemical sense (1794) is immediately from French phosphoreux.
phosphorous phos·pho·rous (fŏs’fər-əs, fŏs-fôr’əs)
adj.
Of, relating to, or containing phosphorus, especially with a valence of 3 or a valence lower than that of a comparable phosphoric compound.
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noun, Chemistry. 1. a colorless, crystalline, water-soluble acid of phosphorus, H 3 PO 3 , from which phosphites are derived. noun 1. Also called orthophosphorous acid. a white or yellowish hygroscopic crystalline dibasic acid. Formula: H3PO3 Systematic name phosphoric acid 2. any oxyacid of phosphorus containing less oxygen than the corresponding phosphoric acid phosphorous acid […]
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[fos-fer-uh s] /ˈfɒs fər əs/ noun, plural phosphori [fos-fuh-rahy] /ˈfɒs fəˌraɪ/ (Show IPA) 1. Chemistry. a solid, nonmetallic element existing in at least three allotropic forms, one that is yellow, poisonous, flammable, and luminous in the dark, one that is red, less poisonous, and less flammable, and another that is black, insoluble in most solvents, […]
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[fos-fer-uh s] /ˈfɒs fər əs/ noun 1. . /ˈfɒsfərəs/ noun 1. an allotropic nonmetallic element occurring in phosphates and living matter. Ordinary phosphorus is a toxic flammable phosphorescent white solid; the red form is less reactive and nontoxic: used in matches, pesticides, and alloys. The radioisotope phosphorus-32 (radiophosphorus), with a half-life of 14.3 days, is […]
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[pen-tok-sahyd, -sid] /pɛnˈtɒk saɪd, -sɪd/ noun, Chemistry. 1. a white, deliquescent, crystalline powder, P 2 O 5 , that, depending upon the amount of water it absorbs, forms orthophosphoric acid, metaphosphoric acid, or pyrophosphoric acid, produced by the burning of phosphorus in dry air: used in the preparation of phosphoric acids, as a drying and […]