The term papilla (plural: papillae) generally means a nipple-like structure, and may refer to:
- Mammary papilla, or nipple
- Amphibian papilla and basal papilla, part of the inner ear of the frog.
- Interdental papilla, part of the gingiva between teeth
- Dental papilla, cells involved in a developing tooth
- Renal papilla, in the kidney
- Lacrimal papilla, on the eyelid
- Major duodenal papilla, the opening of the pancreatic duct and common bile duct into the duodenum
- Minor duodenal papilla, the opening of the accessory pancreatic duct into the duodenum
- Dermal papillae, at the base of every hair follicle
- Papillary thyroid cancer, a type of disease
- Papilloma, a benign epithelial tumor
- Papillary muscle, a muscle in the heart
- Cuticular papilla, a raised thickening in plant cuticle, not large enough to be considered a trichome or hair
On the tongue
- All lingual papillae contain taste buds except for filiform papillae.
On a fish
On a sea cucumber
On a mushroom
- ^ Norton N, illustrations by Netter FH [et al.] (2007). Netter's head and neck anatomy for dentistry. Philadelphia, Pa.: Saunders Elsevier. p. 402. ISBN 1929007884.