1. <anatomy> Generally a small sac or vesicle.

2. <botany> A kind of fruit formed from a single carpel, that splits to release its seeds.

3. <dermatology> A hair follicle, an invagination of the epidermis into the dermis surrounding the hair root.

4. <gynaecology, physiology> An ovarian follicle, an oocyte surrounded by one or more layers of granulosa cells. As the ovarian follicle develops a cavity forms and it is then termed a Graafian follicle.

(12 Nov 1997)