osteochondritis dissecans
/ˌɒstɪəʊkɒnˌdrʌɪtɪs ˈdɪsɪkanz/Medicine
noun
A disorder in which there is partial or total separation of a fragment of bone and cartilage from an articular surface, most commonly seen in young adults.
Origin
Late 19th century; earliest use found in Annals of Surgery. From scientific Latin osteochondritis dissecans from scientific Latin osteochondritis + classical Latin dissecans present participle of dissecāre.