Vein

One of the vessels which carry blood, either venous or arterial, to the heart. See Artery, 2.

One of the similar branches of the framework of a leaf.

One of the ribs or nervures of the wings of insects. See Venation.

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.

A fissure, cleft, or cavity, as in the earth or other substance.

A streak or wave of different color, appearing in wood, and in marble and other stones; variegation.

A train of association, thoughts, emotions, or the like; a current; a course.

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.

To form or mark with veins; to fill or cover with veins.

a blood vessel that carries blood from the capillaries toward the heart; "all veins except the pulmonary vein carry unaerated blood"

a distinctive style or manner; "he continued in this vein for several minutes"

one of the horny ribs that stiffen and support the wing of an insect

a layer of ore between layers of rock

any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ