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be·ta-thal·as·se·mia | \ ˈbā-tə-ˌtha-lə-ˈsē-mē-ə 
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\Definition of beta-thalassemia
: thalassemia in which the longer hemoglobin chain is affected and which comprises Cooley's anemia in the homozygous condition and thalassemia minor in the heterozygous condition
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The first known use of beta-thalassemia was in 1962
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