(anatomy) A blood vessel that transports blood from the capillaries back to the heart.

(in the plural) The entrails of a shrimp.

(botany) In leaves, a thickened portion of the leaf containing the vascular bundle.

(zoology) The nervure of an insect’s wing.

A stripe or streak of a different color or composition in materials such as wood, cheese, marble or other rocks, and it can also refer to a sheetlike body of crystallized minerals within a rock in geology.

(figurative) A topic of discussion; a train of association, thoughts, emotions, etc.

(figurative) A style, tendency, or quality.

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

To mark with veins or a vein-like pattern.