Developmental disorder caused by deficiency of thyroidhormone, characterized by severe mental retardation and stunted physical growth, sometimes resulting from maternal iodine deficiency.
Source: PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 740 (https://doi.org/10.1515/pac-2015-1202)