"amphioxus" meaning in English

{
  "etymology_text": "From Greek: amphi \"on both sides\" + oxýs \"sharp, keen\" = \"pointed on both sides\".",
  "forms": [
    {
      "form": "amphioxi",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "amphioxuses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "amphioxi",
        "2": "+"
      },
      "expansion": "amphioxus (plural amphioxi or amphioxuses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Chordates",
          "orig": "en:Chordates",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "The lancelet, particularly of the genus Branchiostoma."
      ],
      "id": "en-amphioxus-en-noun-5pDvcH8J",
      "links": [
        [
          "lancelet",
          "lancelet"
        ],
        [
          "Branchiostoma",
          "Branchiostoma#Translingual"
        ]
      ]
    }
  ],
  "word": "amphioxus"
}

{
  "etymology_text": "From Greek: amphi \"on both sides\" + oxýs \"sharp, keen\" = \"pointed on both sides\".",
  "forms": [
    {
      "form": "amphioxi",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "amphioxuses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "amphioxi",
        "2": "+"
      },
      "expansion": "amphioxus (plural amphioxi or amphioxuses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English nouns with irregular plurals",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Chordates"
      ],
      "glosses": [
        "The lancelet, particularly of the genus Branchiostoma."
      ],
      "links": [
        [
          "lancelet",
          "lancelet"
        ],
        [
          "Branchiostoma",
          "Branchiostoma#Translingual"
        ]
      ]
    }
  ],
  "word": "amphioxus"
}