from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A small, cone-shaped organ in the brain of most vertebrates that secretes the hormone melatonin.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun anatomy A small, pinecone-shaped
endocrine glandfound near the centre of the brain that produces melatonin.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
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