Papilla

Papilla (Latin, 'nipple') or papillae may refer to:

In animals

 * Papilla (fish anatomy), in the mouth of fish
 * Basilar papilla, a sensory organ of lizards, amphibians and fish
 * Dental papilla, in a developing tooth
 * Dermal papillae, part of the skin structure
 * Major duodenal papilla, in the duodenum
 * Minor duodenal papilla, in the duodenum
 * Genital papilla, a feature of the external genitalia of some animals
 * Mammary papilla or nipple, a raised region of tissue on the surface of the breast
 * Interdental papilla, part of the gums
 * Lacrimal papilla, on the bottom eyelid
 * Lingual papillae, small structures on the upper surface of the tongue
 * Renal papilla, part of the kidney
 * Tumor papilla, consisting of tumor cells surrounding a fibrovascular core

In plants and fungi

 * Papilla (mycology), a nipple-shaped protrusion in the center of the cap
 * Stigmatic papilla, part of the stigma (botany)