ecchondroma

noun
ec·​chon·​dro·​ma | \ ˌek-ən-ˈdrō-mə How to pronounce ecchondroma (audio) \
plural ecchondromata\ -​mət-​ə How to pronounce ecchondromata (audio) \ also ecchondromas

Medical Definition of ecchondroma

: a cartilaginous tumor projecting from bone or cartilage