"trifid cipher" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "text": "Coordinate term: bifid cipher"
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      "glosses": [
        "A classical cipher that extends the earlier bifid cipher with the use of trigrams."
      ],
      "id": "en-trifid_cipher-en-noun-fNUGALIo",
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        [
          "bifid cipher",
          "bifid cipher"
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      "raw_glosses": [
        "(cryptography) A classical cipher that extends the earlier bifid cipher with the use of trigrams."
      ],
      "topics": [
        "computing",
        "cryptography",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
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  "word": "trifid cipher"
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      "expansion": "trifid cipher",
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  "lang_code": "en",
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          "text": "Coordinate term: bifid cipher"
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        "A classical cipher that extends the earlier bifid cipher with the use of trigrams."
      ],
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          "classical",
          "classical"
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          "bifid cipher",
          "bifid cipher"
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          "trigram",
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      "raw_glosses": [
        "(cryptography) A classical cipher that extends the earlier bifid cipher with the use of trigrams."
      ],
      "topics": [
        "computing",
        "cryptography",
        "engineering",
        "mathematics",
        "natural-sciences",
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  "word": "trifid cipher"
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