[ pĭn′ē-ə-lō′mə, pī′nē- ]
n. pl. pin•e•a•lo•mas
A neoplasm derived from the pineal body and characterized by large, round, or polygonal cells with large nuclei and small cells that resemble lymphocytes.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.