\sˌuːpəsəbstˈanʃə͡l], \sˌuːpəsəbstˈanʃə‍l], \s_ˌuː_p_ə_s_ə_b_s_t_ˈa_n_ʃ_əl]\
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1899 - The american dictionary of the english language.
By Daniel Lyons

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  • pH values above 7 The quality which constitutes an alkali; alkaline property. state of being alkaline; the degree to which a substance exhibits alkaline properties or an reaction.
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