"tail-beam" meaning in English

{
  "forms": [
    {
      "form": "tail-beams",
      "tags": [
        "plural"
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  "head_templates": [
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      "args": {},
      "expansion": "tail-beam (plural tail-beams)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "examples": [
        {
          "ref": "2011, Stanley Freese, Windmills and Millwrighting, Cambridge University Press, page 40:",
          "text": "Old post-mills were turned or 'luffed' into the wind by a pole variously called the tail-pole, tail-beam, turning-beam, or tiller-beam.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of tail-pole"
      ],
      "id": "en-tail-beam-en-noun-zxI-i8b-",
      "links": [
        [
          "tail-pole",
          "tail-pole#English"
        ]
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      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
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          "word": "tail-pole"
        }
      ]
    }
  ],
  "word": "tail-beam"
}

{
  "forms": [
    {
      "form": "tail-beams",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tail-beam (plural tail-beams)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English lemmas",
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        "English nouns",
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        "Pages with entries",
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      "examples": [
        {
          "ref": "2011, Stanley Freese, Windmills and Millwrighting, Cambridge University Press, page 40:",
          "text": "Old post-mills were turned or 'luffed' into the wind by a pole variously called the tail-pole, tail-beam, turning-beam, or tiller-beam.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of tail-pole"
      ],
      "links": [
        [
          "tail-pole",
          "tail-pole#English"
        ]
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          "word": "tail-pole"
        }
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    }
  ],
  "word": "tail-beam"
}