"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": "91 9",
          "kind": "topical",
          "langcode": "ca",
          "name": "Greek letter names",
          "orig": "ca:Greek letter names",
          "parents": [
            "Letter names",
            "Letters, symbols, and punctuation",
            "Names",
            "Orthography",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Writing",
            "Fundamental",
            "Nouns",
            "Human behaviour",
            "Language",
            "Lemmas",
            "Human",
            "Communication"
          ],
          "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": "topical",
          "langcode": "ca",
          "name": "Geography",
          "orig": "ca:Geography",
          "parents": [
            "Earth sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "39 61",
          "kind": "other",
          "name": "Catalan entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "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"
}