"цэц" meaning in Mongol

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en mongol",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mongol",
      "orig": "mongol",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Mongol",
  "lang_code": "mn",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "ᠴᠡᠴᠡ, tsets"
  ],
  "senses": [
    {
      "glosses": [
        "Essence, nature (des choses)."
      ],
      "id": "fr-цэц-mn-noun-POJRwHkq"
    }
  ],
  "word": "цэц"
}

{
  "categories": [
    "Noms communs en mongol",
    "mongol"
  ],
  "lang": "Mongol",
  "lang_code": "mn",
  "pos": "noun",
  "pos_title": "Nom commun",
  "raw_tags": [
    "ᠴᠡᠴᠡ, tsets"
  ],
  "senses": [
    {
      "glosses": [
        "Essence, nature (des choses)."
      ]
    }
  ],
  "word": "цэц"
}