Lingual tonsil
Tonsilla lingualis
Definition
The posterior third of the dorsum of the tongue looks backward, and is smoother, and contains numerous muciparous glands and lymph follicles (lingual tonsil).
References
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).