Definitions

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 gland found 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

Etymologies

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Examples

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