"pecero" meaning in Spanish

{
  "forms": [
    {
      "form": "peceros",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "pecera",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "peceras",
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "f": "+"
      },
      "expansion": "pecero m (plural peceros, feminine pecera, feminine plural peceras)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "member of the Partido Comunista de España"
      ],
      "id": "en-pecero-es-noun-RcKA09mv",
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "pecero"
}

{
  "forms": [
    {
      "form": "peceros",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "pecera",
      "tags": [
        "feminine"
      ]
    },
    {
      "form": "peceras",
      "tags": [
        "feminine",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "f": "+"
      },
      "expansion": "pecero m (plural peceros, feminine pecera, feminine plural peceras)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 1 entry",
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish nouns",
        "Spanish nouns with red links in their headword lines"
      ],
      "glosses": [
        "member of the Partido Comunista de España"
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "pecero"
}