American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any gland, as the thyroid, adrenal, or pituitary gland, that secretes hormones into the blood or lymph; ductless gland.
Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
gland, secreter, secretor, secretory organ – any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream
endocrine system – the system of glands that produce endocrine secretions that help to control bodily metabolic activity
parathyroid, parathyroid gland – any one of four endocrine glands situated above or within the thyroid gland
adrenal, adrenal gland, suprarenal gland – either of a pair of complex endocrine glands situated near the kidney
prostate, prostate gland – a firm partly muscular chestnut sized gland in males at the neck of the urethra; produces a viscid secretion that is the fluid part of semen
thymus gland, thymus – a ductless glandular organ at the base of the neck that produces lymphocytes and aids in producing immunity; atrophies with age
hypophysis, pituitary, pituitary body, pituitary gland – the master gland of the endocrine system; located at the base of the brain
adenohypophysis, anterior pituitary, anterior pituitary gland – the anterior lobe of the pituitary body; primarily glandular in nature
neurohypophysis, pars nervosa, posterior pituitary, posterior pituitary gland – the posterior lobe of the pituitary body; primarily glandular in nature
epiphysis cerebri, pineal body, pineal gland, epiphysis – a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin
islands of Langerhans, isles of Langerhans, islets of Langerhans – cell clusters in the pancreas that form the endocrine part of that organ; secrete insulin and other hormones
corpus luteum – yellow endocrine tissue that forms in a ruptured Graafian follicle following the release of an ovum; it degenerates after a few days unless pregnancy has begun
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
- adrenal cortex
- adrenal gland
- adrenal medulla
- anterior pituitary
- anterior pituitary gland
- corpus luteum
- endocrine gland
- endocrine glands
- endocrine system
- epiphysis cerebri
These are among the ductless glands , the functions of which, both in physiology and in connection with the emotions, have only come to be known during recent years.
The Thyroid is an endocrine or ductless gland situated at the base of our neck and is shaped like a butterfly secretes hormones including thyroxine (T4) and triiodothyronine (T3) and calcitron that regulate the body’s metabolism and growth.
In 1776, the thyroid was classified as a ductless gland by Albrecht von Haller and was thought to have numerous functions ranging from lubrication of the larynx to acting as a reservoir for blood to provide continuous flow to the brain.