osteogenesis imperfecta
noun
osteogenesis im·per·fec·ta
-ˌim-(ˌ)pər-ˈfek-tə
: a hereditary disease caused by defective or deficient collagen production and marked by extreme brittleness of the long bones and a bluish color of the whites of the eyes
called also brittle bone disease, brittle bones
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Merriam-Webster unabridged
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