medullary
Adjective
pl: nullpast: nullpp: nulling: nullcomp: nullsup: null
This term is used almost exclusively in medical and biological contexts to describe the internal core of a structure. It carries a clinical, precise tone and is rarely encountered in casual conversation or general literature. While it refers to the center of various organs, it is most frequently associated with the marrow of bones or the central part of the kidney and the brainstem. It describes a specific anatomical location rather than a function or a state of being.