Anatomy, Physiology. a clear yellowish, slightly alkaline, coagulable fluid, containing white blood cells in a liquid resembling blood plasma, that is derived from the tissues of the body and conveyed to the bloodstream by the lymphatic vessels.
Archaic. the sap of a plant.
Archaic. a stream or spring of clear, pure water.

1620–30; < Latin lympha water (earlier *limpa; see limpid); pseudo-Greek form, by association with nympha < Greek nýmphē nymph Unabridged


variant of lympho- before a vowel: lymphoma. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
lymph (lɪmf)
the almost colourless fluid, containing chiefly white blood cells, that is collected from the tissues of the body and transported in the lymphatic system
[C17: from Latin lympha water, from earlier limpa influenced in form by Greek numphē nymph]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1725 in physiology sense, "colorless fluid found in the body," from Fr. lymphe, from L. lympha "water, clear water, a goddess of water," variant of lumpæ "waters," altered by infl. of Gk. nymphe "goddess of a spring, nymph." Lymph node is attested from 1892.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

lymph (lĭmf)
A clear, watery, sometimes faintly yellowish fluid derived from body tissues that contains white blood cells and circulates throughout the lymphatic system, returning to the venous bloodstream through the thoracic duct. Lymph acts to remove bacteria and certain proteins from the tissues, transport fat from the small intestine, and supply mature lymphocytes to the blood.

lymph- pref.
Variant of lympho-.

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
lymph   (lĭmf)  Pronunciation Key 
The clear fluid flowing through the lymphatic system that serves to bathe and nourish the tissues of the body. It is composed of blood plasma that has leaked out through the capillaries into the tissues.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
lymph [(limf)]

A clear, colorless fluid that circulates through the lymphatic system. Lymph fills the tissue spaces of the body.

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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Example sentences
In infancy, scrofulous lymph nodes were found in his neck and attributed to the
  tuberculosis of his wet nurse.
Some of the potentially harmful ink ends up in the body's lymph nodes, part of
  the immune system.
These structures function as the lymph nodes of the eye, trapping unwanted dirt
  and detritus.
Victims become lethargic and may suffer severe swelling of the lymph nodes.
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