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  1. Oxford American Dictionary

    illuminant

    • IPA[iˈlo͞omənənt]

    美式

    • n.
      a means of lighting or source of light
    • adj.
      giving off light.

    • noun: illuminant, plural noun: illuminants

    • 釋義

    名詞

    • 1. technical a means of lighting or source of light until 1880, oil was the only illuminant in use

    形容詞

    • 1. giving off light.