follicle In animals, a small cavity in the body. One example is a hair follicle, a pit on the surface of the skin from which a hair grows. Another example is an ovarian follicle, one of the many fluid-filled cavities in the ovaries in which an ovum (egg) develops. In plants, a follicle is a dry single-seeded fruit that splits along one margin only to liberate the seeds, e.g., larkspurs, columbine. See also legume. Related categories • ANATOMY AND PHYSIOLOGY • BOTANY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) |