macroglossia

https://doi.org/10.1351/goldbook.10909

Congenital disorder characterized by an abnormally enlarged tongue.

Note: This is often seen in Down syndrome.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 774 [Terms] [Paper]