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(), a.[Pref. im- not + ponderable: cf. F. impondrable.] Not ponderable; without sensible or appreciable weight; incapable of being weighed. Impon"derable n.(Physics) An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism, regarded as subtile fluids destitute of weight but in modern science little used. スポンサード リンク
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