Anomalies observed in individuals with congenital defects of the thyroid gland and deficiency of its secretion. [thyro- + G. a- priv. + plasis, a molding]
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thy·ro·apla·sia (thi″ro-ə-plaґzhə) [thyro- + aplasia] defective development of the thyroid gland with hypothyroidism.Medical dictionary. 2011.