noun, British.
the roadbed and track of a railroad.
(mainly Brit) the track of a railway, including the ballast, sleepers, rails, etc


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  • Permanganic-acid

    noun, Chemistry. 1. an acid, HMnO 4 , known only in solution. /ˌpɜːmænˈɡænɪk/ noun 1. a monobasic acid known only in solution and in the form of permanganate salts. Formula: HMnO4 Systematic name manganic(VII) acid permanganic acid per·man·gan·ic acid (pûr’mān-gān’ĭk, -māng-) n. An unstable inorganic acid existing only in dilute solution. Its purple aqueous solution […]

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