"posterior triangle" meaning in English

{
  "forms": [
    {
      "form": "posterior triangles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "posterior triangle (plural posterior triangles)",
      "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": "Anatomy",
          "orig": "en:Anatomy",
          "parents": [
            "Biology",
            "Medicine",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Meronyms: occipital triangle, supraclavicular triangle"
        }
      ],
      "glosses": [
        "A triangular region that is a landmark in the neck, has its apex above at the occipital bone, and is bounded in front by the sternocleidomastoid muscle, behind by the anterior margin of the trapezius, and inferiorly by the middle third of the clavicle."
      ],
      "id": "en-posterior_triangle-en-noun-k5WCsMfz",
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "triangular",
          "triangular"
        ],
        [
          "region",
          "region"
        ],
        [
          "landmark",
          "landmark"
        ],
        [
          "neck",
          "neck"
        ],
        [
          "apex",
          "apex"
        ],
        [
          "occipital bone",
          "occipital bone"
        ],
        [
          "bound",
          "bound"
        ],
        [
          "sternocleidomastoid muscle",
          "sternocleidomastoid muscle"
        ],
        [
          "anterior",
          "anterior"
        ],
        [
          "margin",
          "margin"
        ],
        [
          "trapezius",
          "trapezius"
        ],
        [
          "inferiorly",
          "inferiorly"
        ],
        [
          "clavicle",
          "clavicle"
        ]
      ],
      "raw_glosses": [
        "(anatomy) A triangular region that is a landmark in the neck, has its apex above at the occipital bone, and is bounded in front by the sternocleidomastoid muscle, behind by the anterior margin of the trapezius, and inferiorly by the middle third of the clavicle."
      ],
      "related": [
        {
          "word": "anterior triangle"
        }
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "sense": "region of the neck",
          "word": "後三角"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "hòu sānjiǎo",
          "sense": "region of the neck",
          "word": "后三角"
        }
      ]
    }
  ],
  "word": "posterior triangle"
}

{
  "forms": [
    {
      "form": "posterior triangles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "posterior triangle (plural posterior triangles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "anterior triangle"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Anatomy"
      ],
      "examples": [
        {
          "text": "Meronyms: occipital triangle, supraclavicular triangle"
        }
      ],
      "glosses": [
        "A triangular region that is a landmark in the neck, has its apex above at the occipital bone, and is bounded in front by the sternocleidomastoid muscle, behind by the anterior margin of the trapezius, and inferiorly by the middle third of the clavicle."
      ],
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "triangular",
          "triangular"
        ],
        [
          "region",
          "region"
        ],
        [
          "landmark",
          "landmark"
        ],
        [
          "neck",
          "neck"
        ],
        [
          "apex",
          "apex"
        ],
        [
          "occipital bone",
          "occipital bone"
        ],
        [
          "bound",
          "bound"
        ],
        [
          "sternocleidomastoid muscle",
          "sternocleidomastoid muscle"
        ],
        [
          "anterior",
          "anterior"
        ],
        [
          "margin",
          "margin"
        ],
        [
          "trapezius",
          "trapezius"
        ],
        [
          "inferiorly",
          "inferiorly"
        ],
        [
          "clavicle",
          "clavicle"
        ]
      ],
      "raw_glosses": [
        "(anatomy) A triangular region that is a landmark in the neck, has its apex above at the occipital bone, and is bounded in front by the sternocleidomastoid muscle, behind by the anterior margin of the trapezius, and inferiorly by the middle third of the clavicle."
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "sense": "region of the neck",
      "word": "後三角"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "hòu sānjiǎo",
      "sense": "region of the neck",
      "word": "后三角"
    }
  ],
  "word": "posterior triangle"
}