(?), n. [Pyro- + Gr. sound.] A musical instrument in which the tones are produced by flames of hydrogen, or illuminating gas, burning in tubes of different sizes and lengths.
[1913 Webster]





(?), } a. [Pyro- + Gr. fe`rein to bear.] Light-producing; of or pertaining to pyrophorus.
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Pyrophoric iron (Chem.), finely reduced iron, which ignites spontaneously on contact with air.
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(?), n. [NL. See Pyrophorous.] (Old Chem.) Any one of several substances or mixtures which phosphoresce or ignite spontaneously on exposure to air, as a heated mixture of alum, potash, and charcoal, or a mixture of charcoal and finely divided lead.
[1913 Webster]


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Wed 13th November 2019