outermost; the outermost coat of a blood vessel; the adventitia.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
extima(ĕks′tĭ-mă) [L., outermost]
The outer layer of a structure.
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