"spiral arm" meaning in English

{
  "forms": [
    {
      "form": "spiral arms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "spiral arm (plural spiral arms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Astronomy",
          "orig": "en:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1979, Douglas Adams, The Hitchhiker's Guide to the Galaxy",
          "text": "Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the Galaxy lies a small unregarded yellow sun.",
          "type": "quotation"
        },
        {
          "ref": "2008, BioWare, Mass Effect, Redwood City: Electronic Arts, →OCLC, PC, scene: Mass Relays Codex entry",
          "text": "Primary mass relays can propel ships thousands of light years, often from one spiral arm of the galaxy to another.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A section of a spiral galaxy that coils out from the centre."
      ],
      "id": "en-spiral_arm-en-noun-BnZF6y7E",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "spiral galaxy",
          "spiral galaxy"
        ],
        [
          "coil",
          "coil"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A section of a spiral galaxy that coils out from the centre."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "xuánbì",
          "sense": "section of a spiral galaxy",
          "word": "旋臂"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "section of a spiral galaxy",
          "word": "kierteishaara"
        }
      ]
    }
  ],
  "word": "spiral arm"
}

{
  "forms": [
    {
      "form": "spiral arms",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "spiral arm (plural spiral arms)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Astronomy"
      ],
      "examples": [
        {
          "ref": "1979, Douglas Adams, The Hitchhiker's Guide to the Galaxy",
          "text": "Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the Galaxy lies a small unregarded yellow sun.",
          "type": "quotation"
        },
        {
          "ref": "2008, BioWare, Mass Effect, Redwood City: Electronic Arts, →OCLC, PC, scene: Mass Relays Codex entry",
          "text": "Primary mass relays can propel ships thousands of light years, often from one spiral arm of the galaxy to another.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A section of a spiral galaxy that coils out from the centre."
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "spiral galaxy",
          "spiral galaxy"
        ],
        [
          "coil",
          "coil"
        ]
      ],
      "raw_glosses": [
        "(astronomy) A section of a spiral galaxy that coils out from the centre."
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "xuánbì",
      "sense": "section of a spiral galaxy",
      "word": "旋臂"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "section of a spiral galaxy",
      "word": "kierteishaara"
    }
  ],
  "word": "spiral arm"
}