"syncline" meaning in English

{
  "antonyms": [
    {
      "word": "anticline"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*ḱley-",
        "id": "incline"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "en",
        "2": "syn",
        "3": "cline"
      },
      "expansion": "syn- + -cline",
      "name": "confix"
    }
  ],
  "etymology_text": "syn- + -cline",
  "forms": [
    {
      "form": "synclines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "syncline (plural synclines)",
      "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": "other",
          "name": "English terms prefixed with syn-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -cline",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Geology",
          "orig": "en:Geology",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A concave-upward fold in rock strata"
      ],
      "holonyms": [
        {
          "word": "synform"
        }
      ],
      "id": "en-syncline-en-noun-JQ5LBMjs",
      "links": [
        [
          "geology",
          "geology"
        ],
        [
          "concave",
          "concave"
        ],
        [
          "upward",
          "upward"
        ],
        [
          "fold",
          "fold"
        ],
        [
          "rock",
          "rock"
        ],
        [
          "strata",
          "strata"
        ]
      ],
      "raw_glosses": [
        "(geology) A concave-upward fold in rock strata"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "syncline"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsɪn.klaɪn/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "[ˈsɪŋˌklaɪn]",
      "tags": [
        "US"
      ]
    },
    {
      "rhymes": "-ɪnklaɪn"
    }
  ],
  "word": "syncline"
}

{
  "antonyms": [
    {
      "word": "anticline"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*ḱley-",
        "id": "incline"
      },
      "expansion": "",
      "name": "root"
    },
    {
      "args": {
        "1": "en",
        "2": "syn",
        "3": "cline"
      },
      "expansion": "syn- + -cline",
      "name": "confix"
    }
  ],
  "etymology_text": "syn- + -cline",
  "forms": [
    {
      "form": "synclines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "syncline (plural synclines)",
      "name": "en-noun"
    }
  ],
  "holonyms": [
    {
      "word": "synform"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English 2-syllable words",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms derived from Proto-Indo-European",
        "English terms derived from the Proto-Indo-European root *ḱley- (incline)",
        "English terms prefixed with syn-",
        "English terms suffixed with -cline",
        "English terms with IPA pronunciation",
        "Rhymes:English/ɪnklaɪn",
        "Rhymes:English/ɪnklaɪn/2 syllables",
        "en:Geology"
      ],
      "glosses": [
        "A concave-upward fold in rock strata"
      ],
      "links": [
        [
          "geology",
          "geology"
        ],
        [
          "concave",
          "concave"
        ],
        [
          "upward",
          "upward"
        ],
        [
          "fold",
          "fold"
        ],
        [
          "rock",
          "rock"
        ],
        [
          "strata",
          "strata"
        ]
      ],
      "raw_glosses": [
        "(geology) A concave-upward fold in rock strata"
      ],
      "topics": [
        "geography",
        "geology",
        "natural-sciences"
      ],
      "wikipedia": [
        "syncline"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsɪn.klaɪn/",
      "tags": [
        "US"
      ]
    },
    {
      "ipa": "[ˈsɪŋˌklaɪn]",
      "tags": [
        "US"
      ]
    },
    {
      "rhymes": "-ɪnklaɪn"
    }
  ],
  "word": "syncline"
}