"vortex ring" meaning in English

{
  "forms": [
    {
      "form": "vortex rings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vortex ring (plural vortex rings)",
      "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",
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          "source": "w"
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          "kind": "other",
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      ],
      "examples": [
        {
          "text": "Vortex rings are rarely noticed unless the motion is revealed by suspended particles, as in smoke rings.",
          "type": "example"
        }
      ],
      "glosses": [
        "A toroidal vortex in a fluid or gas, i.e. a region where the fluid mostly spins around an imaginary axis line that forms a closed loop."
      ],
      "id": "en-vortex_ring-en-noun-gDk4gBem",
      "links": [
        [
          "toroidal",
          "toroidal"
        ],
        [
          "vortex",
          "vortex"
        ],
        [
          "fluid",
          "fluid"
        ],
        [
          "gas",
          "gas"
        ]
      ],
      "wikipedia": [
        "vortex ring"
      ]
    }
  ],
  "word": "vortex ring"
}

{
  "forms": [
    {
      "form": "vortex rings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "vortex ring (plural vortex rings)",
      "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 usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Vortex rings are rarely noticed unless the motion is revealed by suspended particles, as in smoke rings.",
          "type": "example"
        }
      ],
      "glosses": [
        "A toroidal vortex in a fluid or gas, i.e. a region where the fluid mostly spins around an imaginary axis line that forms a closed loop."
      ],
      "links": [
        [
          "toroidal",
          "toroidal"
        ],
        [
          "vortex",
          "vortex"
        ],
        [
          "fluid",
          "fluid"
        ],
        [
          "gas",
          "gas"
        ]
      ],
      "wikipedia": [
        "vortex ring"
      ]
    }
  ],
  "word": "vortex ring"
}