adrenal glands

Science Dictionary
adrenal gland   (ə-drē'nəl)  Pronunciation Key 


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Either of two small endocrine glands, one located above each kidney. The outer portion, or cortex, secretes steroid hormones (corticosteroids). The inner portion, or medulla, secretes epinephrine and norepinephrine.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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