Pronunciation: (uh-DREE-nul meh-DOO-luh)
The inner part of the adrenal gland (a small organ on top of each kidney). The adrenal medulla makes chemicals such as epinephrine (adrenaline) and norepinephrine (noradrenaline) which are involved in sending nerve signals.
Source: NCI Dictionary of Cancer Terms
Caption: Anatomy of the adrenal gland. There are two adrenal glands, one on top of each kidney. The outer part of each gland is the adrenal cortex; the inner part is the adrenal medulla.2006-04-14 Date last modified: 2013-06-03