Definition of follicle
1 a
:a small anatomical cavity or deep narrow-mouthed depression
b
:a small lymph node
c
:a vesicle in the mammalian ovary that contains a developing egg surrounded by a covering of cells;
especially
:graafian follicle
2
:a dry dehiscent one-celled many-seeded fruit (as of the milkweed) that has a single carpel and opens along one suture
