[pin-ee-uh l, pahy-nee-, pahy-nee-]


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 formspre·pin·e·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pineal

Historical Examples of pineal

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

  • 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

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

    The Brain

    Alexander Blade

British Dictionary definitions for pineal



resembling a pine cone
of or relating to the pineal gland

Word Origin for pineal

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.)).

Online Etymology Dictionary, © 2010 Douglas Harper

pineal in Medicine


[pĭnē-əl, pīnē-]


Having the form of a pine cone.
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.