"attogramme" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "atto",
        "3": "gramme"
      },
      "expansion": "atto- + gramme",
      "name": "prefix"
    }
  ],
  "etymology_text": "From atto- + gramme.",
  "forms": [
    {
      "form": "attogrammes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "attogramme (plural attogrammes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "attogram"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with atto-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative spelling of attogram."
      ],
      "id": "en-attogramme-en-noun-X857gzFd",
      "links": [
        [
          "attogram",
          "attogram#English"
        ]
      ],
      "raw_glosses": [
        "(British spelling) Alternative spelling of attogram."
      ],
      "tags": [
        "UK",
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "attogramme"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "atto",
        "3": "gramme"
      },
      "expansion": "atto- + gramme",
      "name": "prefix"
    }
  ],
  "etymology_text": "From atto- + gramme.",
  "forms": [
    {
      "form": "attogrammes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "attogramme (plural attogrammes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "attogram"
        }
      ],
      "categories": [
        "British English forms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with atto-",
        "Pages with 2 entries",
        "Pages with entries"
      ],
      "glosses": [
        "Alternative spelling of attogram."
      ],
      "links": [
        [
          "attogram",
          "attogram#English"
        ]
      ],
      "raw_glosses": [
        "(British spelling) Alternative spelling of attogram."
      ],
      "tags": [
        "UK",
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "attogramme"
}