"骨髄" meaning in Japans

{
  "categories": [
    {
      "kind": "other",
      "name": "Woorden in het Japans",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Zelfstandig naamwoord in het Japans",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Samensteling van 骨 (« bot ») en 髄 (« merg »)."
  ],
  "lang": "Japans",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "Zelfstandig naamwoord",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Anatomie_in_het_Japans",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "beenmerg"
      ],
      "id": "nl-骨髄-ja-noun-LAG7r7Ia",
      "topics": [
        "anatomy"
      ]
    }
  ],
  "word": "骨髄"
}

{
  "categories": [
    "Woorden in het Japans",
    "Zelfstandig naamwoord in het Japans"
  ],
  "etymology_texts": [
    "Samensteling van 骨 (« bot ») en 髄 (« merg »)."
  ],
  "lang": "Japans",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "Zelfstandig naamwoord",
  "senses": [
    {
      "categories": [
        "Anatomie_in_het_Japans"
      ],
      "glosses": [
        "beenmerg"
      ],
      "topics": [
        "anatomy"
      ]
    }
  ],
  "word": "骨髄"
}