"infradental" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "infra",
        "3": "dental"
      },
      "expansion": "infra- + dental",
      "name": "prefix"
    }
  ],
  "etymology_text": "From infra- + dental.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "infradental (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 infra-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Teeth",
          "orig": "en:Teeth",
          "parents": [
            "Mouth",
            "Face",
            "Head and neck",
            "Body parts",
            "Body",
            "Anatomy",
            "All topics",
            "Biology",
            "Medicine",
            "Fundamental",
            "Sciences",
            "Healthcare",
            "Health"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Beneath the teeth"
      ],
      "id": "en-infradental-en-adj-2K~V37LY",
      "links": [
        [
          "teeth",
          "tooth"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛntəl"
    }
  ],
  "word": "infradental"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "infra",
        "3": "dental"
      },
      "expansion": "infra- + dental",
      "name": "prefix"
    }
  ],
  "etymology_text": "From infra- + dental.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "infradental (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 infra-",
        "English uncomparable adjectives",
        "Pages with 2 entries",
        "Pages with entries",
        "Rhymes:English/ɛntəl",
        "Rhymes:English/ɛntəl/4 syllables",
        "en:Teeth"
      ],
      "glosses": [
        "Beneath the teeth"
      ],
      "links": [
        [
          "teeth",
          "tooth"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛntəl"
    }
  ],
  "word": "infradental"
}