Definition of hypothyroidism noun from the Oxford Advanced American Dictionary

 

hypothyroidism

 noun
noun
NAmE//ˌhaɪpoʊˈθaɪrɔɪˌdɪzəm//
 
[uncountable](medical)
 
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a condition in which the thyroid is not active enough, making growth and mental development slower than normal
See the Oxford Advanced Learner's Dictionary entry: hypothyroidism