'Peyer's patches' definitions:
Definition of 'Peyer's patches'
From: GCIDE
- Peyer's glands \Pey"er's glands`\ [So called from J. K. Peyer, who described them in 1677.] (Anat.) Patches of lymphoid nodules, in the walls of the small intestiness; agminated glands; -- called also {Peyer's patches}. In typhoid fever they become the seat of ulcers which are regarded as the characteristic organic lesion of that disease. [1913 Webster]