alopecia
noun [ U ] medical specialized uk/ˌæl.əˈpiː.ʃə/ /ˌæl.əʊˈpiː.ʃə/ us/ˌæl.oʊˈpiː.ʃə/
毛发脱落;变秃;（尤指）脱发
loss of hair, especially from the head, that either happens naturally or is caused by disease
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