[1] : The Collaborative International Dictionary of English v.0.48

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.
   1913 webster
see also:
veined veining 

[2] : The Collaborative International Dictionary of English v.0.48

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.
      1913 webster

   2. bot. one of the similar branches of the framework of a
      leaf.
      1913 webster

   3. zool. one of the ribs or nervures of the wings of
      insects. see venation.
      1913 webster

   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.
      1913 webster

   5. a fissure, cleft, or cavity, as in the earth or other
      substance. "down to the veins of earth." --milton.
      1913 webster

            let the glass of the prisms be free from veins.
                                                  --sir i.
                                                  newton.
      1913 webster

   6. a streak or wave of different color, appearing in wood,
      and in marble and other stones; variegation.
      1913 webster

   7. a train of associations, thoughts, emotions, or the like;
      a current; a course; as, reasoning in the same vein.
      1913 webster

            he can open a vein of true and noble thinking.
                                                  --swift.
      1913 webster

   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.
      1913 webster

            certain discoursing wits which are of the same
            veins.                                --bacon.
      1913 webster

            invoke the muses, and improve my vein. --waller.
      1913 webster
see also:
artery venation 

[3] : WordNet (r) 2.0

vein
     n 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
     v : make a veinlike pattern
see also:
vena venous blood vessel nervure mineral vein 

[4] : Moby Thesaurus II by Grady Ward, 1.0

197 moby thesaurus words for "vein":
   affectation, aorta, arteriole, artery, attitude, band, bar, bed,
   bespangle, bespeckle, bespot, blood vessel, blotch, body-build,
   bonanza, brand, capillary, carotid, cast, character,
   characteristic, characteristics, check, checker, chimney, chute,
   command of language, complexion, composition, constituents,
   constitution, cornucopia, country rock, course, crasis, cue,
   dapple, deposit, dharma, diathesis, dike, disposition, dot, ethos,
   exaggeration, expression of ideas, fashion, feeling,
   feeling for words, fettle, fiber, flake, fleck, font,
   form of speech, fount, fountain, frame, frame of mind, freckle,
   gangue, genius, gold mine, grace of expression, grain,
   grandiloquence, gruel, habit, harlequin, heart, hint, hue, humor,
   humors, ilk, inflation, iris, jugular vein, kind, lath, line,
   literary style, lode, lodestuff, maculate, makeup, manner,
   manner of speaking, mannerism, marble, marbleize, matrix,
   mere shadow, mind, mine, mineral deposit, mode, mode of expression,
   mold, mood, morale, motley, mottle, nature, note, ore bed, paper,
   pattern, pay dirt, peculiarity, pepper, personal style, physique,
   polychrome, polychromize, portal vein, property, pulmonary artery,
   pulmonary vein, quality, quarry, rail, rainbow, rake, resource,
   rhetoric, seam, sense of language, shade, shadow, shaving, shoot,
   skeleton, slat, slip, somatotype, sort, soup, source,
   source of supply, spangle, speck, speckle, spirit, spirits,
   splinter, splotch, spot, spring, sprinkle, stamp, staple,
   state of mind, stigmatize, stipple, stock, strain, stratum, streak,
   stria, striate, striation, stripe, stud, style, stylistic analysis,
   stylistics, suchness, suggestion, suspicion, system, tattoo,
   temper, temperament, tendency, tenor, tessellate, the grand style,
   the plain style, the sublime, thread, tincture, tinge, tone, touch,
   trace, trick, type, variegate, veinlet, vena cava, venation,
   venule, wafer, way, well, wellspring

Vein >> V Words
Vein, definition of term: Vein
vein_pag1.html

Varicose Vein >> V Words
Varicose Vein, definition of term: Varicose Vein
varicose+vein_pag1.html

Umbilical Vein >> U Words
Umbilical Vein, definition of term: Umbilical Vein
umbilical+vein_pag1.html

Pulmonary Vein >> P Words
Pulmonary Vein, definition of term: Pulmonary Vein
pulmonary+vein_pag1.html