ˌästēōpə̇.ˈtrōsə̇s noun
Etymology: New Latin, from oste- + petr- + -osis
1. : an abnormal thickening and hardening of bone often with the development of bands of varying density in the long bones and sometimes with partial occlusion of the marrow cavities
2.
a. : a hereditary disorder that affects the bones of human beings and that is marked by extreme density and hardness and abnormal fragility — called also marble bones
b. : a hereditary bone disease of rabbits that is marked by enlargement and faulty development of the skeletal parts
c. : a disease of the avian leukosis complex 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 and varying degrees of anemia — called also marble bone