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Vein - Dictionary Definition and Overview |
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Vein : (noun)
1: a blood vessel that carries blood from the capillaries
toward the heart; all veins except the pulmonary carry
unaerated blood [syn: vena, venous blood vessel]
2: a distinctive style or manner; "he continued in this vein
for several minutes"
3: any of the vascular bundles or ribs that form the branching
framework of conducting and supporting tissues in a leaf
or other plant organ [syn: nervure]
4: a layer of ore between layers of rock [syn: mineral vein]
5: one of the horny ribs that stiffen and support the wing of
an insect [syn: nervure]
(verb)
1: make a veinlike pattern
Based on WordNet 2.0
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Vein : \Vein\, v. t. [imp. & p. p. Veined; p. pr. & vb. n.
Veining.]
To form or mark with veins; to fill or cover with veins.
--Tennyson.
Based on Webster's Revised Unabridged Dictionary
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Vein : \Vein\, n. [OE. veine, F. veine, L. vena.]
1. (Anat.) One of the vessels which carry blood, either
venous or arterial, to the heart. See Artery, 2.
2. (Bot.) One of the similar branches of the framework of a
leaf.
3. (Zo["o]l.) One of the ribs or nervures of the wings of
insects. See Venation.
4. (Geol. or Mining) A narrow mass of rock intersecting other
rocks, and filling inclined or vertical fissures not
corresponding with the stratification; a lode; a dike; --
often limited, in the language of miners, to a mineral
vein or lode, that is, to a vein which contains useful
minerals or ores.
5. A fissure, cleft, or cavity, as in the earth or other
substance. ``Down to the veins of earth.'' --Milton.
Let the glass of the prisms be free from veins.
--Sir I.
Newton.
6. A streak or wave of different color, appearing in wood,
and in marble and other stones; variegation.
7. A train of association, thoughts, emotions, or the like; a
current; a course.
He can open a vein of true and noble thinking.
--Swift.
8. Peculiar temper or temperament; tendency or turn of mind;
a particular disposition or cast of genius; humor; strain;
quality; also, manner of speech or action; as, a rich vein
of humor; a satirical vein. --Shak.
Certain discoursing wits which are of the same
veins. --Bacon.
Invoke the Muses, and improve my vein. --Waller.
Based on Webster's Revised Unabridged Dictionary
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Vein : Vein: A blood vessel that carries blood low in oxygen content from the body back to the heart. The deoxygenated form of hemoglobin (deoxyhemoglobin) in venous blood makes it appear dark.
Veins are part of the afferent wing of the circulatory system which returns blood to the heart.
By contrast, an artery is a vessel that carries blood high in oxygen away from the heart to the body. The oxygenated form of hemoglobin (oxyhemoglobin) in arterial blood makes it look bright red.
Arteries are part of the efferent wing of the circulatory system which carries blood away from the heart.
Based on Webster's Revised Unabridged Dictionary (1913)
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