Papilla

A papilla (plural: papillae) can be:
 * A small projection, such as a nipple-like projection on the skin, at the base of a hair or the root of a feather; the base of a new tooth.
 * A pimple or blister
 * An interdental papilla is the part of the gingiva located between teeth.
 * Dental papilla
 * Renal papilla
 * Lacrimal papilla
 * Mammary papilla
 * Any of the small projections on the top of the tongue:
 * vallate papilla (contains taste buds)
 * fungiform papilla (contains taste buds)
 * filiform papilla (does not contain taste buds)
 * foliate papilla (contains taste buds)
 * Alternative name for the Optic disc of the eye.
 * Genital papilla, found in fishes.