"до Р. Хр." meaning in Russian

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "до Рождества́ Христо́ва",
        "3": "",
        "4": "before Christ's birth"
      },
      "expansion": "Abbreviation of до Рождества́ Христо́ва (do Roždestvá Xristóva, “before Christ's birth”)",
      "name": "abbrev"
    }
  ],
  "etymology_text": "Abbreviation of до Рождества́ Христо́ва (do Roždestvá Xristóva, “before Christ's birth”).",
  "head_templates": [
    {
      "args": {},
      "expansion": "до Р. Хр. • (do R. Xr.)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "BC (before Christ); BCE (before the Common Era)"
      ],
      "id": "en-до_Р._Хр.-ru-adv-HfmycrBe",
      "links": [
        [
          "BC",
          "BC"
        ],
        [
          "BCE",
          "BCE"
        ]
      ],
      "related": [
        {
          "roman": "pósle R. Xr.",
          "word": "по́сле Р. Хр."
        }
      ],
      "synonyms": [
        {
          "word": "до н.э."
        },
        {
          "word": "до н. э."
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[də‿rəʐdʲɪstˈva xrʲɪˈstovə]"
    }
  ],
  "word": "до Р. Хр."
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "ru",
        "2": "до Рождества́ Христо́ва",
        "3": "",
        "4": "before Christ's birth"
      },
      "expansion": "Abbreviation of до Рождества́ Христо́ва (do Roždestvá Xristóva, “before Christ's birth”)",
      "name": "abbrev"
    }
  ],
  "etymology_text": "Abbreviation of до Рождества́ Христо́ва (do Roždestvá Xristóva, “before Christ's birth”).",
  "head_templates": [
    {
      "args": {},
      "expansion": "до Р. Хр. • (do R. Xr.)",
      "name": "ru-adv"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "adv",
  "related": [
    {
      "roman": "pósle R. Xr.",
      "word": "по́сле Р. Хр."
    }
  ],
  "senses": [
    {
      "categories": [
        "Russian abbreviations",
        "Russian adverbs",
        "Russian entries with incorrect language header",
        "Russian lemmas",
        "Russian multiword terms",
        "Russian terms spelled with .",
        "Russian terms with IPA pronunciation"
      ],
      "glosses": [
        "BC (before Christ); BCE (before the Common Era)"
      ],
      "links": [
        [
          "BC",
          "BC"
        ],
        [
          "BCE",
          "BCE"
        ]
      ],
      "synonyms": [
        {
          "word": "до н.э."
        },
        {
          "word": "до н. э."
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[də‿rəʐdʲɪstˈva xrʲɪˈstovə]"
    }
  ],
  "word": "до Р. Хр."
}

{
  "called_from": "form_descriptions/1698",
  "msg": "unrecognized head form: do R. Xr.",
  "path": [
    "до Р. Хр."
  ],
  "section": "Russian",
  "subsection": "adverb",
  "title": "до Р. Хр.",
  "trace": ""
}