"diamond frame" meaning in English

{
  "etymology_text": "From the diamond shape of a conventional bicycle frame created by the two triangles head tube, top tube, down tube and seat tube, chain stays and seat stays.",
  "forms": [
    {
      "form": "diamond frames",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "diamond frame (plural diamond frames)",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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            "Entries with incorrect language header",
            "Entry maintenance"
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        }
      ],
      "glosses": [
        "A modern, upright bicycle shape or design, as distinguished from a penny-farthing bicycle, a recumbent, etc."
      ],
      "id": "en-diamond_frame-en-noun-LiMU3PAk",
      "links": [
        [
          "upright",
          "upright"
        ],
        [
          "penny-farthing",
          "penny-farthing"
        ],
        [
          "recumbent",
          "recumbent"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "bicycle shape",
          "word": "timanttirunko"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "bicycle shape",
          "tags": [
            "masculine"
          ],
          "word": "Diamantrahmen"
        }
      ]
    }
  ],
  "word": "diamond frame"
}

{
  "etymology_text": "From the diamond shape of a conventional bicycle frame created by the two triangles head tube, top tube, down tube and seat tube, chain stays and seat stays.",
  "forms": [
    {
      "form": "diamond frames",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "diamond frame (plural diamond frames)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations",
        "Terms with German translations"
      ],
      "glosses": [
        "A modern, upright bicycle shape or design, as distinguished from a penny-farthing bicycle, a recumbent, etc."
      ],
      "links": [
        [
          "upright",
          "upright"
        ],
        [
          "penny-farthing",
          "penny-farthing"
        ],
        [
          "recumbent",
          "recumbent"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "bicycle shape",
      "word": "timanttirunko"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "bicycle shape",
      "tags": [
        "masculine"
      ],
      "word": "Diamantrahmen"
    }
  ],
  "word": "diamond frame"
}