(-ae) L. = a teat, a nipple; a nipple-like projection, e.g., on the tonge (Malpighi, c. 1670; cf. circumvallate, filiform, foliate, fungiform, vallate); duodenal papilla (containing duodenal ampulla); optic papilla; renal papilla (Berengarius, c. 1480-1550).
The papilla is found at the base of the hair follicle. This is the primary location where the cells that form hair are produced. Blood vessels are connected to the papilla, which send necessary proteins and vitamins to the roots to nourish the hair.
(pl. papillae, adj. papillate) ( Wodehouse, 1935) A small protuberance. Comment: The term is mostly used in describing pollen of Taxodiaceae (Gymnospermae). Papilla (pl. papillae, adj. papillate) ( Traverse, 1955) A general term, applied in palynology to parallel sided exinous elements with rounded apices, less than 1µm in length. See also: scabrate. * Paracavate (adj.) ( Balme, 1988) An exine in which the intexine is clearly defined but in which its degree of separation from the exoexine is uncertain or indeterminate. Example: Ancyrospora langii.* Paraisopolar ( Praglowski et al., 1983) Describing a pollen grain whose polar faces differ only in the attachment of viscin threads to the proximal pole. Synonym of subisopolar. Comment: Most pollen grains with viscin threads have polar faces of which one is less/more convex than the other.
A small round or conical projection on the skin, at the root of a hair or feather, or at the base of a developing tooth. 2. One of the small, rounded projections of the upper tongue surface of vertebrates that contain taste buds.
any cone-shaped protuberance projecting from the surface of an organ or organism. Papillae occur, for example, on the tongue, in the kidneys, in plants, on the surface of many petals and leaves, and in algae, on the surface of the blades.