Daily Almanac for
Nov 30, 2009
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pin'eal gland"




a small, cone-shaped endocrine organ in the posterior forebrain, secreting melatonin and involved in biorhythms and gonadal development. Also called epiphysis. See diag. under brain.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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