"rapidograph" meaning in English

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  "etymology_text": "From the brand name of a technical pen introduced by Rotring in the 1950s, presumably rapid + -o- + -graph.",
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    {
      "form": "rapidographs",
      "tags": [
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  "lang_code": "en",
  "pos": "noun",
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          "name": "Writing instruments",
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      ],
      "glosses": [
        "A technical pen."
      ],
      "id": "en-rapidograph-en-noun-Vebd0UFZ",
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      "wikipedia": [
        "Rotring"
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  "word": "rapidograph"
}

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  ],
  "etymology_text": "From the brand name of a technical pen introduced by Rotring in the 1950s, presumably rapid + -o- + -graph.",
  "forms": [
    {
      "form": "rapidographs",
      "tags": [
        "plural"
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        "A technical pen."
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