Definitions for "Peyer's Patches"
Lymphoid nodules in the wall of the intestine that form part of the enteric immune system.
Any of numerous large oval patches of closely aggregated nodules of lymphoid tissue in the walls of the small intestines esp. in the ileum that partially or entirely disappear in advanced life and in typhoid fever become the seat of ulcers which may perforate the intestines --called also Peyer's gland Peyer, Johann Conrad (1653-1712), Swiss physician and anatomist.
aggregated lymph nodules that are most abundant in the ileum; also called aggregated lymphatic follicles