離り断だん性せい骨こつ軟なん骨こつ炎えんりだんせいこつなんこつえんMeanings1nounosteochondritis dissecansmedicine›Medical term for a joint condition in which a fragment of cartilage and underlying bone separates from the joint surface.離り断だん性せい骨こつ軟なん骨こつ炎えんは膝