follicle; ovarian follicle
Medical and biological term. Most commonly refers to ovarian follicles, but can also denote other small sac-like structures in the body.
We measure the size of the ovarian follicles with an ultrasound.
When the follicle matures, ovulation occurs.
parafollicular cell
Graafian follicle
From 濾 (filter, strain) and 胞 (sac, placenta). The term was coined in medical contexts to describe small sac-like structures that filter or contain fluid.