• synonyms


[pin-ee-uh l, pahy-nee-, pahy-nee-]
  1. resembling a pine cone in shape.
  2. of or relating to the pineal body.
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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 formspre·pin·e·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pineal

Historical Examples

  • This pineal eye has been compared in structure to the eye of Ascidians.

    Stories of the Universe: Animal Life

    B. Lindsay

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


    James Joyce

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


    James Huneker

  • I've kept away now from the Pineal Gland for three nights in succession.

    The Brain

    Alexander Blade

  • In the human, the pineal gland was the despair of the medical sciences.

    The Brain

    Alexander Blade

British Dictionary definitions for pineal


  1. resembling a pine cone
  2. of or relating to the pineal gland
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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

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.)).

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Online Etymology Dictionary, © 2010 Douglas Harper

pineal in Medicine


(pĭnē-əl, pīnē-)
  1. Having the form of a pine cone.
  2. Of or relating to the pineal body.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.