"n-pentane" meaning in English

{
  "etymology_text": "The letter n may be used in front of pentane in order to differentiate the normal straight-chain pentane from its isomers.",
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      "expansion": "n-pentane (uncountable)",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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      ],
      "glosses": [
        "The saturated aliphatic hydrocarbon (CH₃(CH₂)₃CH₃)."
      ],
      "id": "en-n-pentane-en-noun-couv1znn",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "saturated",
          "saturated"
        ],
        [
          "aliphatic",
          "aliphatic"
        ],
        [
          "hydrocarbon",
          "hydrocarbon"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) The saturated aliphatic hydrocarbon (CH₃(CH₂)₃CH₃)."
      ],
      "synonyms": [
        {
          "word": "pentane"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ],
      "wikipedia": [
        "n-pentane"
      ]
    }
  ],
  "word": "n-pentane"
}

{
  "etymology_text": "The letter n may be used in front of pentane in order to differentiate the normal straight-chain pentane from its isomers.",
  "head_templates": [
    {
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        "head": "n-pentane"
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      "expansion": "n-pentane (uncountable)",
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    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English nouns",
        "English uncountable nouns",
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      ],
      "glosses": [
        "The saturated aliphatic hydrocarbon (CH₃(CH₂)₃CH₃)."
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "saturated",
          "saturated"
        ],
        [
          "aliphatic",
          "aliphatic"
        ],
        [
          "hydrocarbon",
          "hydrocarbon"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) The saturated aliphatic hydrocarbon (CH₃(CH₂)₃CH₃)."
      ],
      "tags": [
        "uncountable"
      ],
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        "chemistry",
        "natural-sciences",
        "organic-chemistry",
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      "wikipedia": [
        "n-pentane"
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  ],
  "synonyms": [
    {
      "word": "pentane"
    }
  ],
  "word": "n-pentane"
}