tonsil

https://doi.org/10.1351/goldbook.11308

Small, rounded mass of tissue, especially of lymphoid tissue; generally used to designate one of the paired palatine tonsils.

Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 813 [Terms] [Paper]