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[veyn] /veɪn/
one of the system of branching vessels or tubes conveying blood from various parts of the body to the heart.
(loosely) any blood vessel.
one of the riblike thickenings that form the framework of the wing of an insect.
one of the strands or bundles of vascular tissue forming the principal framework of a leaf.
any body or stratum of ore, coal, etc., clearly separated or defined:
a rich vein of coal.
a body or mass of igneous rock, deposited mineral, or the like occupying a crevice or fissure in rock; lode.
a natural channel or watercourse beneath the surface of the earth.
the water running through such a channel.
a streak or marking, as of a different shade or color, running through marble, wood, etc.
a condition, mood, or temper:
a vein of pessimism.
a tendency, quality, or strain traceable in character, conduct, writing, etc.; manner or style:
to write in a poetic vein.
verb (used with object)
to furnish with veins.
to mark with lines or streaks suggesting veins.
to extend over or through in the manner of veins:
Broad new highways vein the countryside.
1250-1300; Middle English veine < Old French < Latin vēna vein of the body, channel, ore deposit
Related forms
veinal, adjective
veinless, adjective
veinlike, adjective
intervein, verb (used with object)
interveinal, adjective
subvein, noun
unveined, adjective
Can be confused
vain, vane, vein.
11. tone, streak, touch, hint, thread. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for vein
  • vein the externally visible vascular bundles, found on leafs, petals and other parts.
  • Typically the form is vein or fracture filling, nodular, or botryoidal in habit.
  • In the same vein, the weather experienced in the south and the north varies considerably.
  • The veins end in the left innominate vein, and in the thyroid veins.
  • Some think that the value of the word bleu is used to designate the blue of the vein.
  • Chalcocite is sometimes found as a primary vein mineral in hydrothermal veins.
  • Their discovery was actually part of the comstock lode, but not a main vein.
  • Lives were lost by falling into sumps of this water hot from the vein.
  • Method the first step is ligating the supplying artery and vein, to prevent hemorrhage.
British Dictionary definitions for vein


any of the tubular vessels that convey oxygen-depleted blood to the heart Compare pulmonary vein, artery related adjective venous
any of the hollow branching tubes that form the supporting framework of an insect's wing
any of the vascular strands of a leaf
a clearly defined mass of ore, mineral, etc, filling a fault or fracture, often with a tabular or sheetlike shape
an irregular streak of colour or alien substance in marble, wood, or other material
a natural underground watercourse
a crack or fissure
a distinctive trait or quality in speech, writing, character, etc; strain: a vein of humour
a temporary disposition, attitude, or temper; mood: the debate entered a frivolous vein
(Irish) a parting in hair
verb (transitive)
to diffuse over or cause to diffuse over in streaked patterns
to fill, furnish, or mark with or as if with veins
Derived Forms
veinal, adjective
veinless, adjective
veinlike, adjective
veiny, adjective
Word Origin
C13: from Old French veine, from Latin vēna
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
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Word Origin and History for vein

c.1300, from Old French veine, from Latin vena "a blood vessel," also "a water course, a vein of metal, a person's natural ability or interest," of unknown origin. The mining sense is attested in English from late 14c. (Greek phleps "vein" had the same secondary sense). Figurative sense of "strain or intermixture" (of some quality) is recorded from 1560s; that of "a humor or mood, natural tendency" is first recorded 1570s.

Online Etymology Dictionary, © 2010 Douglas Harper
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vein in Medicine

vein (vān)

  1. Any of the branching blood vessels carrying blood toward the heart. All veins except the pulmonary vein carry dark unaerated blood.

  2. A blood vessel.

v. veined, vein·ing, veins
To supply or fill with veins.
vein'al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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vein in Science
  1. Any of the blood vessels that carry blood toward the heart from the body's cells, tissues, and organs. Veins are thin-walled and contain valves that prevent the backflow of blood. All veins except the pulmonary vein carry blood with low levels of oxygen.

  2. One of the narrow, usually branching tubes or supporting parts forming the framework of an insect's wing or a leaf. Veins in insect wings carry hemolymph and contain a nerve. Veins in leaves contain vascular tissue, with the xylem usually occurring on the upper side of the vein (bringing in water and nutrients) and the phloem on the lower side (carrying away food). See more at leaf, venation.

  3. A long, narrow deposit of mineral or rock that fills the void formed by a fracture or fault in another rock. The mineralogy of the host rock surrounding the vein is often altered where it is in contact with the vein because of chemical reactions between the two rock types.

venous adjective (vē'nəs)
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for vein



: a veggie pal of ours

  1. A vegetarian (1975+)
  2. A person who relaxes and does nothing: When I finish this paper, I'm just going to be a veggie (1980s+ College)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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