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Definition of "pineal" [pi•ne•al]

  • Having the form of a pine cone. (adjective)
  • Of or relating to the pineal body. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "pineal" in a sentence
  • "By Plato the rational soul is placed in the brain, whilst Descartes relegates it to the minute portion of it called the pineal gland."
  • "As a result, Yale had a kind of head start in pineal research."
  • "When the sun sets and darkness sweeps over, a pea-sized structure located deep between the hemispheres of your brain called the pineal gland begins to secrete this hormone, preparing you for bed."