"femtogram" meaning in English

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  "etymology_text": "From femto- + gram.",
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      "form": "femtograms",
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            "Units of measure",
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      "glosses": [
        "An SI unit of mass equal to 10⁻¹⁵ grams. Symbol: fg"
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      "id": "en-femtogram-en-noun-6mX4BF2o",
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        [
          "fg",
          "fg"
        ]
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        "(metrology) An SI unit of mass equal to 10⁻¹⁵ grams. Symbol: fg"
      ],
      "topics": [
        "metrology"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "unit of mass",
          "word": "femtogramma"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "unit of mass",
          "tags": [
            "masculine"
          ],
          "word": "femtogramo"
        }
      ]
    }
  ],
  "word": "femtogram"
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  "etymology_text": "From femto- + gram.",
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        "(metrology) An SI unit of mass equal to 10⁻¹⁵ grams. Symbol: fg"
      ],
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  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "unit of mass",
      "word": "femtogramma"
    },
    {
      "code": "es",
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      "sense": "unit of mass",
      "tags": [
        "masculine"
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      "word": "femtogramo"
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  ],
  "word": "femtogram"
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