"penteno" meaning in Portuguese

{
  "forms": [
    {
      "form": "pentenos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "penteno m (plural pentenos)",
      "name": "pt-noun"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Portuguese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "pt",
          "name": "Organic compounds",
          "orig": "pt:Organic compounds",
          "parents": [
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "pentene (any of several isomeric alkenes having five carbon atoms and one double bond)"
      ],
      "id": "en-penteno-pt-noun-CCjSpk5B",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "pentene",
          "pentene"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) pentene (any of several isomeric alkenes having five carbon atoms and one double bond)"
      ],
      "synonyms": [
        {
          "word": "amileno"
        }
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "penteno"
}

{
  "forms": [
    {
      "form": "pentenos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "penteno m (plural pentenos)",
      "name": "pt-noun"
    }
  ],
  "lang": "Portuguese",
  "lang_code": "pt",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Portuguese countable nouns",
        "Portuguese entries with incorrect language header",
        "Portuguese lemmas",
        "Portuguese masculine nouns",
        "Portuguese nouns",
        "pt:Organic compounds"
      ],
      "glosses": [
        "pentene (any of several isomeric alkenes having five carbon atoms and one double bond)"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "pentene",
          "pentene"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) pentene (any of several isomeric alkenes having five carbon atoms and one double bond)"
      ],
      "synonyms": [
        {
          "word": "amileno"
        }
      ],
      "tags": [
        "masculine"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "penteno"
}