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[pin-ee-uh l, pahy-nee-, pahy-nee-] /ˈpɪn i əl, ˈpaɪ ni-, paɪˈni-/
resembling a pine cone in shape.
of or relating to the pineal body.
Origin of pineal
1675-85; < New Latin pīneālis, equivalent to Latin pīne(a) pine cone, noun use of feminine of pīneus of a pine tree (pīn(us) pine1 + -eus -eous) + -ālis -al1
Related forms
prepineal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for pineal
Historical Examples
  • This pineal eye has been compared in structure to the eye of Ascidians.

  • Lotus ladies tend them i'the eyes, their pineal glands aglow.

    Ulysses James Joyce
  • The pineal gland is the seat of the soul, and miracles fence us in at every step.

    Unicorns James Huneker
  • I've kept away now from the pineal Gland for three nights in succession.

    The Brain Alexander Blade
  • But there was one gland which had not been duplicated in The Brain, the pineal gland.

    The Brain Alexander Blade
  • In the human, the pineal gland was the despair of the medical sciences.

    The Brain Alexander Blade
  • The midnight hours he spent in the pineal gland were only a sideline of his work.

    The Brain Alexander Blade
  • He tried another outlet; this one was marked "pineal gland."

    The Brain Alexander Blade
  • What happened if one plugged some apparatus of the pineal gland into the circuit of the pineal gland?

    The Brain Alexander Blade
  • The pineal gland contained a large quantity of gritty matter.

British Dictionary definitions for pineal


/ˈpɪnɪəl; paɪˈniːəl/
resembling a pine cone
of or relating to the pineal gland
Word Origin
C17: via French from Latin pīnea pine cone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for pineal

1680s, in reference to the gland in the brain, from French pinéal, literally "like a pine cone," from Latin pinea "pine cone," from pinus "pine tree" (see pine (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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pineal in Medicine

pineal pin·e·al (pĭn'ē-əl, pī'nē-)

  1. Having the form of a pine cone.

  2. Of or relating to the pineal body.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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