Definition of osteoporosis noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɒstiəʊpəˈrəʊsɪs//
; NAmE NAmE//ˌɑːstioʊpəˈroʊsɪs//
(also brittle bone disease) [uncountable] (medical)
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a condition in which the bones become weak and are easily broken, usually when people get older or because they do not eat enough of certain substances Word Originmid 19th cent.: from osteo- ‘bone’ + Greek poros ‘passage, pore’ + -osis.
See the Oxford Advanced American Dictionary entry: osteoporosis