What is the medical term for the inflammation of the tonsils?

The medical term for the inflammation of the tonsils is "tonsillitis." This term specifically indicates that the tonsils, which are lymphoid tissues located at the back of the throat, are inflamed, often due to infection. Tonsillitis is characterized by symptoms such as sore throat, difficulty swallowing, and swollen tonsils, and may be caused by viral or bacterial infections.

The other terms provided do not relate to tonsil inflammation. Urticaria refers to a skin condition characterized by hives or welts, Trochanter is a term used in anatomy to describe bony prominences on the femur (thigh bone), and a Vesicle is a small fluid-filled blister on the skin or mucous membrane. Each of these terms pertains to different areas of medical study, making tonsillitis the correct choice for this question.