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The Collaborative International Dictionary of English v.0.48 (gcide)

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.
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2. (Bot.) One of the similar branches of the framework of a
leaf.
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3. (Zool.) One of the ribs or nervures of the wings of
insects. See {Venation}.
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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.
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5. A fissure, cleft, or cavity, as in the earth or other
substance. "Down to the veins of earth." --Milton.
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Let the glass of the prisms be free from veins.
--Sir I.
Newton.
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6. A streak or wave of different color, appearing in wood,
and in marble and other stones; variegation.
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7. A train of associations, thoughts, emotions, or the like;
a current; a course; as, reasoning in the same vein.
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He can open a vein of true and noble thinking.
--Swift.
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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.
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Certain discoursing wits which are of the same
veins. --Bacon.
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Invoke the Muses, and improve my vein. --Waller.
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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.
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