osteopetrosis
noun
os·teo·pe·tro·sis
| \ -pə-ˈtrō-səs
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plural osteopetroses\ -ˌsēz
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Medical Definition of osteopetrosis
: a condition characterized by abnormal thickening and hardening of bone: as
a
: a rare hereditary disease characterized by extreme density and hardness and abnormal fragility of the bones with partial or complete obliteration of the marrow cavities
— called also Albers-Schönberg disease, marble bone disease, marble bones
b
: avian leukosis of chickens marked by great enlargement and excessive calcification of the long bones especially of the legs and by more or less complete obliteration of the marrow cavities
— called also marble bone, marble bone disease