tonsillitis n 1: inflammation of the tonsils (especially the palatine tonsils)
Tonsilitis \Ton`sil*i"tis\, n. [NL. See {Tonsil}, and {-itis}.] (Med.) Inflammation of the tonsils; quinsy. [Written also, and more usually, {tonsillitis}.] [1913 Webster]
Tonsillitis \Ton`sil*li"tis\, n. (Med.) Inflammation of the tonsils; --- same as {tonsilitis}. [PJC]