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  1. spectroheliograph

    • IPA[ˌspektrōˈhēlēəɡraf]

    美式

    • n.
      an instrument for taking photographs of the sun in light of one wavelength only.
    • noun: spectroheliograph, plural noun: spectroheliographs

    • 更多解釋
    • IPA[ˌspɛktrə(ʊ)ˈhiːlɪəɡrɑːf]

    英式

    • n.
      an instrument for taking photographs of the sun in light of one wavelength only.

    Oxford Dictionary