- [medulla oblongata] Lower part of the brain stem continuous with the spinal cord, containing neural centers regulating the autonomic functions of breathing, heart rate, and blood pressure.
- Middle (central) part of an organ, as in adrenal medulla, renal medulla, or the medulla of a lymph node.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 776 (https://doi.org/10.1515/pac-2015-1202)