"lambda" meaning in Polish

{
  "forms": [
    {
      "form": "lambda"
    }
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Γράμματα (πολωνικά)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Ελληνικό αλφάβητο (πολωνικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "το γράμμα του ελληνικού αλφάβητου: λάμδα"
      ],
      "id": "el-lambda-pl-noun-KgDKwxG0",
      "raw_tags": [
        "γράμμα"
      ]
    }
  ],
  "word": "lambda"
}

{
  "forms": [
    {
      "form": "lambda"
    }
  ],
  "lang": "Polish",
  "lang_code": "pl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Γράμματα (πολωνικά)",
        "Ελληνικό αλφάβητο (πολωνικά)"
      ],
      "glosses": [
        "το γράμμα του ελληνικού αλφάβητου: λάμδα"
      ],
      "raw_tags": [
        "γράμμα"
      ]
    }
  ],
  "word": "lambda"
}