Medulla refers to the middle of something and derives from the Latin word for marrow. Its anatomical uses include:
- Medulla oblongata, a part of the brain stem
- Renal medulla, a part of the kidney
- Adrenal medulla, a part of the adrenal gland
- Medulla ossea, the marrow inside a bone
- Medulla spinalis, an alternative name for the spinal cord
- Medulla of ovary
- Medulla of thymus
- Medulla of lymph node
- Medulla (hair)
- Medullary ray (disambiguation)
Non-medical uses of the term include:
- Medúlla, a 2004 music album by Icelandic singer Björk
- Medulla, Florida, a U.S. city
- Las Médulas, Ancient Roman gold mines in León, Spain
- Medulla Grammatice or Medulla Grammaticae, a fifteenth-century Latin–Middle English dictionary
- In botany the word pith is loosely used as synonymous with medulla.