endocrine glands

endocrine gland

any of various glands, as the thyroid, adrenal, and pituitary glands, that secrete certain substances or hormones directly into the blood or lymph; ductless gland.


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World English Dictionary
endocrine gland
Also called: ductless gland any of the glands that secrete hormones directly into the bloodstream, including the pituitary, pineal, thyroid, parathyroid, adrenal, testes, ovaries, and the pancreatic islets of Langerhans

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American Heritage
Medical Dictionary

endocrine gland n.
Any of various ductless glands, such as the thyroid, adrenal, or pituitary, having hormonal secretions that pass directly into the bloodstream. Also called ductless gland.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
endocrine gland   (ěn'də-krĭn, -krēn')  Pronunciation Key 
A gland of the body that produces hormones and secretes them directly into the bloodstream. In mammals, the thyroid gland, adrenal glands, and pituitary gland, as well as the ovaries, testes, and the islets of Langerhans of the pancreas are endocrine glands.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
endocrine gland [(en-duh-krin, en-duh-kreen, en-duh-kreyen)]

A gland that secretes hormones directly into the blood. These glands make up the endocrine system.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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