"substernal" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "sternal"
      },
      "expansion": "sub- + sternal",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sub- + sternal.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "substernal (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with sub-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Anatomy",
          "orig": "en:Anatomy",
          "parents": [
            "Biology",
            "Medicine",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "under the sternum"
      ],
      "id": "en-substernal-en-adj-5euzC2im",
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "sternum",
          "sternum"
        ]
      ],
      "raw_glosses": [
        "(anatomy) under the sternum"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ],
      "translations": [
        {
          "code": "ia",
          "lang": "Interlingua",
          "sense": "under the sternum",
          "word": "substernal"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "podgrudinnyj",
          "sense": "under the sternum",
          "word": "подгрудинный"
        }
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɜː(ɹ)nəl"
    }
  ],
  "word": "substernal"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "sternal"
      },
      "expansion": "sub- + sternal",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sub- + sternal.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "substernal (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with sub-",
        "English uncomparable adjectives",
        "Rhymes:English/ɜː(ɹ)nəl",
        "Rhymes:English/ɜː(ɹ)nəl/3 syllables",
        "en:Anatomy"
      ],
      "glosses": [
        "under the sternum"
      ],
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "sternum",
          "sternum"
        ]
      ],
      "raw_glosses": [
        "(anatomy) under the sternum"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɜː(ɹ)nəl"
    }
  ],
  "translations": [
    {
      "code": "ia",
      "lang": "Interlingua",
      "sense": "under the sternum",
      "word": "substernal"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "podgrudinnyj",
      "sense": "under the sternum",
      "word": "подгрудинный"
    }
  ],
  "word": "substernal"
}