An asexual reproductive structure, as found in animals such as hydra (genus Hydra) and plants such as liverworts (division Marchantiophyta), consisting of a cluster of cells from which new individuals can develop; a bud.
A vascular process of connective tissue extending into and nourishing the root of a hair, feather, or developing tooth.
Any of the small protuberances on the upper surface of the tongue often containing taste buds.
A small fleshy projection on a plant.
Any of the vascular protuberances of the dermal layer of the skin extending into the epidermal layer and often containing tactile corpuscles.