"microrhythm" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "micro-",
        "3": "rhythm"
      },
      "expansion": "micro- + rhythm",
      "name": "af"
    }
  ],
  "etymology_text": "From micro- + rhythm.",
  "head_templates": [
    {
      "args": {
        "1": "-"
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      "expansion": "microrhythm (uncountable)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "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"
        },
        {
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          "name": "English terms prefixed with micro-",
          "parents": [],
          "source": "w"
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        {
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          "parents": [],
          "source": "w"
        },
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          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Music",
          "orig": "en:Music",
          "parents": [
            "Art",
            "Sound",
            "Culture",
            "Energy",
            "Society",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Minute, barely-perceptible variation in timing of musical events that contribute to expressivity."
      ],
      "id": "en-microrhythm-en-noun-1Jt-RPWu",
      "links": [
        [
          "music",
          "music"
        ]
      ],
      "raw_glosses": [
        "(music) Minute, barely-perceptible variation in timing of musical events that contribute to expressivity."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    }
  ],
  "word": "microrhythm"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "micro-",
        "3": "rhythm"
      },
      "expansion": "micro- + rhythm",
      "name": "af"
    }
  ],
  "etymology_text": "From micro- + rhythm.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "microrhythm (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Music"
      ],
      "glosses": [
        "Minute, barely-perceptible variation in timing of musical events that contribute to expressivity."
      ],
      "links": [
        [
          "music",
          "music"
        ]
      ],
      "raw_glosses": [
        "(music) Minute, barely-perceptible variation in timing of musical events that contribute to expressivity."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    }
  ],
  "word": "microrhythm"
}