brittle bone disease
noun /ˌbrɪtl ˈbəʊn dɪziːz/
/ˌbrɪtl ˈbəʊn dɪziːz/
[uncountable] (medical)- a rare disease in which somebody’s bones break extremely easily
- (also osteoporosis)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