"subfemtosecond" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "femtosecond"
      },
      "expansion": "sub- + femtosecond",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + femtosecond",
  "head_templates": [
    {
      "args": {
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      "expansion": "subfemtosecond (not comparable)",
      "name": "en-adj"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with sub-",
          "parents": [],
          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "subfemtosecond intervals"
        }
      ],
      "glosses": [
        "Of or pertaining to time spans of less than a femtosecond"
      ],
      "id": "en-subfemtosecond-en-adj-svG826ta",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "femtosecond",
          "femtosecond"
        ]
      ],
      "raw_glosses": [
        "(physics) Of or pertaining to time spans of less than a femtosecond"
      ],
      "related": [
        {
          "word": "subnanosecond"
        },
        {
          "word": "submicrosecond"
        },
        {
          "word": "submillisecond"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "subfemtosecond"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "femtosecond"
      },
      "expansion": "sub- + femtosecond",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + femtosecond",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "subfemtosecond (not comparable)",
      "name": "en-adj"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "subnanosecond"
    },
    {
      "word": "submicrosecond"
    },
    {
      "word": "submillisecond"
    }
  ],
  "senses": [
    {
      "categories": [
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        "en:Physics"
      ],
      "examples": [
        {
          "text": "subfemtosecond intervals"
        }
      ],
      "glosses": [
        "Of or pertaining to time spans of less than a femtosecond"
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "femtosecond",
          "femtosecond"
        ]
      ],
      "raw_glosses": [
        "(physics) Of or pertaining to time spans of less than a femtosecond"
      ],
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        "not-comparable"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "subfemtosecond"
}