"œstrus" meaning in English

{
  "forms": [
    {
      "form": "œstruses",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "œstri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~",
        "2": "+",
        "3": "œstri"
      },
      "expansion": "œstrus (countable and uncountable, plural œstruses or œstri)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "oestrus"
        }
      ],
      "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 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1903, Francis H[ugh] A[dam] Marshall, The Œstrous Cycle and the Formation of the Corpus Luteum in the Sheep (Philosophical Transactions of the Royal Society of London, series B, volume 196), London: […] [F]or the Royal Society by Dulau and Co., […], page 67:",
          "text": "Œstrus was noted in a Black-faced ewe (not a virgin) in the beginning of February, and the ewe was served by a ram of its own breed.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Obsolete form of oestrus."
      ],
      "id": "en-œstrus-en-noun--1TNkwyQ",
      "links": [
        [
          "oestrus",
          "oestrus#English"
        ]
      ],
      "tags": [
        "alt-of",
        "countable",
        "obsolete",
        "uncountable"
      ]
    }
  ],
  "word": "œstrus"
}

{
  "forms": [
    {
      "form": "œstruses",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "œstri",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~",
        "2": "+",
        "3": "œstri"
      },
      "expansion": "œstrus (countable and uncountable, plural œstruses or œstri)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "oestrus"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "English obsolete forms",
        "English terms spelled with Œ",
        "English terms with quotations",
        "English uncountable nouns",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1903, Francis H[ugh] A[dam] Marshall, The Œstrous Cycle and the Formation of the Corpus Luteum in the Sheep (Philosophical Transactions of the Royal Society of London, series B, volume 196), London: […] [F]or the Royal Society by Dulau and Co., […], page 67:",
          "text": "Œstrus was noted in a Black-faced ewe (not a virgin) in the beginning of February, and the ewe was served by a ram of its own breed.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Obsolete form of oestrus."
      ],
      "links": [
        [
          "oestrus",
          "oestrus#English"
        ]
      ],
      "tags": [
        "alt-of",
        "countable",
        "obsolete",
        "uncountable"
      ]
    }
  ],
  "word": "œstrus"
}