"σίγμα" meaning in Greek

{
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "grc",
        "3": "σῖγμᾰ"
      },
      "expansion": "Ancient Greek σῖγμᾰ (sîgma)",
      "name": "inh"
    }
  ],
  "etymology_text": "From Ancient Greek σῖγμᾰ (sîgma).",
  "forms": [
    {
      "form": "sígma",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "10": "",
        "11": "",
        "12": "",
        "13": "",
        "14": "",
        "15": "",
        "16": "",
        "17": "",
        "18": "",
        "19": "",
        "2": "nouns",
        "20": "",
        "21": "",
        "22": "",
        "23": "",
        "24": "",
        "25": "",
        "26": "",
        "27": "",
        "28": "",
        "3": "indeclinable",
        "4": "",
        "5": "",
        "6": "inv",
        "7": "",
        "8": "",
        "9": "",
        "cat2": "",
        "cat3": "",
        "cat4": "indeclinable nouns",
        "g": "n",
        "g2": "",
        "g3": "",
        "head": "",
        "sort": "",
        "tr2": "",
        "ts": ""
      },
      "expansion": "σίγμα • (sígma) n (indeclinable)",
      "name": "head"
    },
    {
      "args": {
        "1": "n",
        "2": "inv"
      },
      "expansion": "σίγμα • (sígma) n (indeclinable)",
      "name": "el-noun"
    }
  ],
  "hyphenation": [
    "σίγ‧μα"
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "el",
          "name": "Greek letter names",
          "orig": "el: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"
        }
      ],
      "glosses": [
        "sigma, the 18th letter of the modern Greek alphabet."
      ],
      "id": "en-σίγμα-el-noun-pUZeDnEB",
      "links": [
        [
          "sigma",
          "sigma"
        ],
        [
          "Greek alphabet",
          "Greek alphabet"
        ]
      ],
      "related": [
        {
          "english": "with a sigma",
          "roman": "sigmatikós",
          "tags": [
            "adjective"
          ],
          "word": "σιγματικός"
        },
        {
          "english": "without sigma",
          "roman": "ásigmos",
          "tags": [
            "adjective"
          ],
          "word": "άσιγμος"
        }
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsiɣma/"
    }
  ],
  "word": "σίγμα"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "grc",
        "3": "σῖγμᾰ"
      },
      "expansion": "Ancient Greek σῖγμᾰ (sîgma)",
      "name": "inh"
    }
  ],
  "etymology_text": "From Ancient Greek σῖγμᾰ (sîgma).",
  "forms": [
    {
      "form": "sígma",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "10": "",
        "11": "",
        "12": "",
        "13": "",
        "14": "",
        "15": "",
        "16": "",
        "17": "",
        "18": "",
        "19": "",
        "2": "nouns",
        "20": "",
        "21": "",
        "22": "",
        "23": "",
        "24": "",
        "25": "",
        "26": "",
        "27": "",
        "28": "",
        "3": "indeclinable",
        "4": "",
        "5": "",
        "6": "inv",
        "7": "",
        "8": "",
        "9": "",
        "cat2": "",
        "cat3": "",
        "cat4": "indeclinable nouns",
        "g": "n",
        "g2": "",
        "g3": "",
        "head": "",
        "sort": "",
        "tr2": "",
        "ts": ""
      },
      "expansion": "σίγμα • (sígma) n (indeclinable)",
      "name": "head"
    },
    {
      "args": {
        "1": "n",
        "2": "inv"
      },
      "expansion": "σίγμα • (sígma) n (indeclinable)",
      "name": "el-noun"
    }
  ],
  "hyphenation": [
    "σίγ‧μα"
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "noun",
  "related": [
    {
      "english": "with a sigma",
      "roman": "sigmatikós",
      "tags": [
        "adjective"
      ],
      "word": "σιγματικός"
    },
    {
      "english": "without sigma",
      "roman": "ásigmos",
      "tags": [
        "adjective"
      ],
      "word": "άσιγμος"
    }
  ],
  "senses": [
    {
      "categories": [
        "Greek entries with incorrect language header",
        "Greek indeclinable nouns",
        "Greek lemmas",
        "Greek neuter nouns",
        "Greek nouns",
        "Greek terms derived from Ancient Greek",
        "Greek terms inherited from Ancient Greek",
        "Pages with 2 entries",
        "Pages with entries",
        "el:Greek letter names"
      ],
      "glosses": [
        "sigma, the 18th letter of the modern Greek alphabet."
      ],
      "links": [
        [
          "sigma",
          "sigma"
        ],
        [
          "Greek alphabet",
          "Greek alphabet"
        ]
      ],
      "tags": [
        "indeclinable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈsiɣma/"
    }
  ],
  "word": "σίγμα"
}