This shows grade level based on the word's complexity.
pineal gland
Save This Word!
This shows grade level based on the word's complexity.
noun
a small, cone-shaped endocrine organ in the posterior forebrain, secreting melatonin and involved in biorhythms and gonadal development.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.
Also called epiphysis.
Origin of pineal gland
First recorded in 1705–15
Words nearby pineal gland
pine, pineal, pineal apparatus, pineal body, pineal eye, pineal gland, pineapple, pineapple guava, pineapple tree, pineapple weed, pine barren
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use pineal gland in a sentence
British Dictionary definitions for pineal gland
pineal gland
pineal body
noun
a pea-sized organ in the brain, situated beneath the posterior part of the corpus callosum, that secretes melatonin into the bloodstreamTechnical names: epiphysis, epiphysis cerebri
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
Scientific definitions for pineal gland
pineal gland
A small gland located near the brain and primarily involved in the production and secretion of the hormone melatonin, which regulates circadian rhythms in many animals, including humans.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.