"pyrimidopyrimidine" meaning in English

{
  "forms": [
    {
      "form": "pyrimidopyrimidines",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "pyrimidopyrimidine (plural pyrimidopyrimidines)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      ],
      "glosses": [
        "A bicyclic heterocycle composed of two pyrimidine rings fused together"
      ],
      "id": "en-pyrimidopyrimidine-en-noun-uznfJRj5",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "bicyclic",
          "bicyclic"
        ],
        [
          "heterocycle",
          "heterocycle"
        ],
        [
          "pyrimidine",
          "pyrimidine"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) A bicyclic heterocycle composed of two pyrimidine rings fused together"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "pyrimidopyrimidine"
}

{
  "forms": [
    {
      "form": "pyrimidopyrimidines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "pyrimidopyrimidine (plural pyrimidopyrimidines)",
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "A bicyclic heterocycle composed of two pyrimidine rings fused together"
      ],
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        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "bicyclic",
          "bicyclic"
        ],
        [
          "heterocycle",
          "heterocycle"
        ],
        [
          "pyrimidine",
          "pyrimidine"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) A bicyclic heterocycle composed of two pyrimidine rings fused together"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "pyrimidopyrimidine"
}