Papilla

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

==In animals== Papilla (fish anatomy), in the mouth of fish Certain surface structures on a number of worms are called "papilla". The worms with this feature are: Bristle worms Thread worms Velvet worms 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