noun Television.
a camera tube, more sensitive than the iconoscope, in which a beam of low-velocity electrons scans a photoemissive mosaic.
Also, orthiconoscope [awr-thi-kon-uh-skohp] .

1935–40; orth- + icon(oscope)

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World English Dictionary
orthicon (ˈɔːθɪˌkɒn)
See also image orthicon a television camera tube in which an optical image produces a corresponding electrical charge pattern on a mosaic surface that is scanned from behind by an electron beam. The resulting discharge of the mosaic provides the output signal current
[C20: from ortho- + icon(oscope)]

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