"umo" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "-um-"
      },
      "expansion": "Back-formation from -um-",
      "name": "back-form"
    }
  ],
  "etymology_text": "Back-formation from -um-.",
  "forms": [
    {
      "form": "umon",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "umoj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "umojn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "umo (accusative singular umon, plural umoj, accusative plural umojn)",
      "name": "eo-head"
    }
  ],
  "hyphenation": [
    "u‧mo"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto back-formations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Esperanto terms suffixed with -um-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 9 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Give me that thingy.",
          "text": "Donu al mi tiun umon.",
          "type": "example"
        }
      ],
      "glosses": [
        "something for which one does not know or cannot recall the name; a whatchamacallit, thingamabob, doohickey"
      ],
      "id": "en-umo-eo-noun-PkK4K0T6",
      "links": [
        [
          "whatchamacallit",
          "whatchamacallit"
        ],
        [
          "thingamabob",
          "thingamabob"
        ],
        [
          "doohickey",
          "doohickey"
        ]
      ],
      "raw_glosses": [
        "(informal) something for which one does not know or cannot recall the name; a whatchamacallit, thingamabob, doohickey"
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "LL-Q143 (epo)-Robin van der Vliet-umo.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/7/76/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/7/76/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav.ogg"
    },
    {
      "ipa": "[ˈumo]"
    },
    {
      "rhymes": "-umo"
    }
  ],
  "word": "umo"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "-um-"
      },
      "expansion": "Back-formation from -um-",
      "name": "back-form"
    }
  ],
  "etymology_text": "Back-formation from -um-.",
  "forms": [
    {
      "form": "umon",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "umoj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "umojn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "umo (accusative singular umon, plural umoj, accusative plural umojn)",
      "name": "eo-head"
    }
  ],
  "hyphenation": [
    "u‧mo"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Esperanto back-formations",
        "Esperanto entries with incorrect language header",
        "Esperanto informal terms",
        "Esperanto lemmas",
        "Esperanto nouns",
        "Esperanto placeholder terms",
        "Esperanto terms suffixed with -um-",
        "Esperanto terms with IPA pronunciation",
        "Esperanto terms with usage examples",
        "Pages with 9 entries",
        "Pages with entries",
        "Rhymes:Esperanto/umo"
      ],
      "examples": [
        {
          "english": "Give me that thingy.",
          "text": "Donu al mi tiun umon.",
          "type": "example"
        }
      ],
      "glosses": [
        "something for which one does not know or cannot recall the name; a whatchamacallit, thingamabob, doohickey"
      ],
      "links": [
        [
          "whatchamacallit",
          "whatchamacallit"
        ],
        [
          "thingamabob",
          "thingamabob"
        ],
        [
          "doohickey",
          "doohickey"
        ]
      ],
      "raw_glosses": [
        "(informal) something for which one does not know or cannot recall the name; a whatchamacallit, thingamabob, doohickey"
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "LL-Q143 (epo)-Robin van der Vliet-umo.wav",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/7/76/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/7/76/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav/LL-Q143_%28epo%29-Robin_van_der_Vliet-umo.wav.ogg"
    },
    {
      "ipa": "[ˈumo]"
    },
    {
      "rhymes": "-umo"
    }
  ],
  "word": "umo"
}