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

osteoporosis

noun
 
/ˌɒstiəʊpəˈrəʊsɪs/
 
/ˌɑːstiəʊpəˈrəʊsɪs/
(also brittle bone disease)
[uncountable] (medical)
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  1. 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
    Oxford Collocations DictionaryOsteoporosis is used before these nouns:
    • prevention
    See full entry
    Word Originmid 19th cent.: from osteo- ‘bone’ + Greek poros ‘passage, pore’ + -osis.
See osteoporosis in the Oxford Advanced American Dictionary

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