"bya" meaning in English

{
  "forms": [
    {
      "form": "bya",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "bya"
      },
      "expansion": "bya (plural bya)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Preceded by a numeral.",
          "word": "billion years ago"
        }
      ],
      "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 5 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "33 26 36 1 2 1 1",
          "kind": "other",
          "name": "Pages with 5 entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "33 26 37 1 2 1 1",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "Alternative forms: Bya, BYA"
        },
        {
          "ref": "2015, Joyce A. Quinn, Susan L. Woodward, “Introduction”, in Earth's Landscape: An Encyclopedia of the World's Geographic Features, volumes I: A–L, Santa Barbara, CA: ABC-CLIO, →ISBN, page xxxi:",
          "text": "The first (oldest) unit of time is the Precambrian Supereon, which covers much of Earth's history from its origins roughly 4.55 bya to 545 mya. Very primitive, one-celled life-forms arose as early as 4.0 bya and near the end of the era (570 mya) the oldest known fossils of multi-celled organisms appear.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Abbreviation of billion years ago. (Preceded by a numeral.)"
      ],
      "id": "en-bya-en-noun-P2jss3jd",
      "links": [
        [
          "billion",
          "billion#English"
        ],
        [
          "year",
          "year#English"
        ],
        [
          "ago",
          "ago#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "bya"
}

{
  "categories": [
    "Pages with 5 entries",
    "Pages with entries",
    "za:Fish"
  ],
  "forms": [
    {
      "form": "bya",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "bya"
      },
      "expansion": "bya (plural bya)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "Preceded by a numeral.",
          "word": "billion years ago"
        }
      ],
      "categories": [
        "English abbreviations",
        "English countable nouns",
        "English entries with incorrect language header",
        "English indeclinable nouns",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English terms with quotations",
        "Pages with 5 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Alternative forms: Bya, BYA"
        },
        {
          "ref": "2015, Joyce A. Quinn, Susan L. Woodward, “Introduction”, in Earth's Landscape: An Encyclopedia of the World's Geographic Features, volumes I: A–L, Santa Barbara, CA: ABC-CLIO, →ISBN, page xxxi:",
          "text": "The first (oldest) unit of time is the Precambrian Supereon, which covers much of Earth's history from its origins roughly 4.55 bya to 545 mya. Very primitive, one-celled life-forms arose as early as 4.0 bya and near the end of the era (570 mya) the oldest known fossils of multi-celled organisms appear.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Abbreviation of billion years ago. (Preceded by a numeral.)"
      ],
      "links": [
        [
          "billion",
          "billion#English"
        ],
        [
          "year",
          "year#English"
        ],
        [
          "ago",
          "ago#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of"
      ]
    }
  ],
  "word": "bya"
}