osteoclastoma

noun
os·​teo·​clas·​to·​ma | \ ˌäs-tē-ō-klas-ˈtō-mə How to pronounce osteoclastoma (audio) \
plural osteoclastomas also osteoclastomata\ -​mət-​ə How to pronounce osteoclastomata (audio) \

Medical Definition of osteoclastoma