cretinism

https://doi.org/10.1351/goldbook.10571

Developmental disorder caused by deficiency of thyroid hormone, 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 [Terms] [Paper]