"delta" meaning in Catalan

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "metall delta"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ca",
        "2": "grc",
        "3": "δέλτα"
      },
      "expansion": "Borrowed from Ancient Greek δέλτα (délta)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek δέλτα (délta).",
  "forms": [
    {
      "form": "deltes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "delta f (plural deltes)",
      "name": "ca-noun"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "95 5",
          "kind": "other",
          "langcode": "ca",
          "name": "Greek letter names",
          "orig": "ca:Greek letter names",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "delta; the Greek letter Δ (lowercase δ)"
      ],
      "id": "en-delta-ca-noun-rQ7TNANz",
      "links": [
        [
          "delta",
          "delta#English"
        ],
        [
          "Δ",
          "Δ"
        ],
        [
          "δ",
          "δ"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "langcode": "ca",
          "name": "Geography",
          "orig": "ca:Geography",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "54 46",
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "a delta"
      ],
      "id": "en-delta-ca-noun-sG3H0~aG",
      "links": [
        [
          "geography",
          "geography"
        ],
        [
          "delta",
          "delta#English"
        ]
      ],
      "raw_glosses": [
        "(geography) a delta"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "geography",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈdɛl.tə]",
      "tags": [
        "Balearic",
        "Central"
      ]
    },
    {
      "ipa": "[ˈdel.ta]",
      "tags": [
        "Valencia"
      ]
    }
  ],
  "word": "delta"
}

{
  "categories": [
    "Catalan countable nouns",
    "Catalan entries with incorrect language header",
    "Catalan feminine nouns",
    "Catalan lemmas",
    "Catalan nouns",
    "Catalan terms borrowed from Ancient Greek",
    "Catalan terms derived from Ancient Greek",
    "Catalan terms with IPA pronunciation",
    "Pages with 23 entries",
    "Pages with entries",
    "ca:Greek letter names",
    "sv:Geography",
    "sv:Greek letter names"
  ],
  "derived": [
    {
      "word": "metall delta"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "ca",
        "2": "grc",
        "3": "δέλτα"
      },
      "expansion": "Borrowed from Ancient Greek δέλτα (délta)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Ancient Greek δέλτα (délta).",
  "forms": [
    {
      "form": "deltes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "delta f (plural deltes)",
      "name": "ca-noun"
    }
  ],
  "lang": "Catalan",
  "lang_code": "ca",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "delta; the Greek letter Δ (lowercase δ)"
      ],
      "links": [
        [
          "delta",
          "delta#English"
        ],
        [
          "Δ",
          "Δ"
        ],
        [
          "δ",
          "δ"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "categories": [
        "ca:Geography"
      ],
      "glosses": [
        "a delta"
      ],
      "links": [
        [
          "geography",
          "geography"
        ],
        [
          "delta",
          "delta#English"
        ]
      ],
      "raw_glosses": [
        "(geography) a delta"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "geography",
        "natural-sciences"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈdɛl.tə]",
      "tags": [
        "Balearic",
        "Central"
      ]
    },
    {
      "ipa": "[ˈdel.ta]",
      "tags": [
        "Valencia"
      ]
    }
  ],
  "word": "delta"
}