"kyBP" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun"
      },
      "expansion": "kyBP",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "thousands of years before present",
          "word": "kiloyears before present"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Calendar",
          "orig": "en:Calendar",
          "parents": [
            "Timekeeping",
            "Time",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of kiloyears before present; thousands of years before present."
      ],
      "id": "en-kyBP-en-noun--~gcJeQL",
      "links": [
        [
          "kiloyear",
          "kiloyear#English"
        ],
        [
          "years",
          "years"
        ],
        [
          "present",
          "present"
        ]
      ],
      "related": [
        {
          "word": "kya"
        }
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "kyBP"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun"
      },
      "expansion": "kyBP",
      "name": "head"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "kya"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "extra": "thousands of years before present",
          "word": "kiloyears before present"
        }
      ],
      "categories": [
        "English entries with incorrect language header",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Calendar"
      ],
      "glosses": [
        "Initialism of kiloyears before present; thousands of years before present."
      ],
      "links": [
        [
          "kiloyear",
          "kiloyear#English"
        ],
        [
          "years",
          "years"
        ],
        [
          "present",
          "present"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "kyBP"
}