vein

1. (anatomy) A blood vessel that transports blood from the capillaries back to the heart.Examples: "The nurse hovered her vein finder to locate the veins in the patient's body."; "An vncouth paine torments my grieued ſoule, And death arreſts the organe of my voyce. Who entring at the breach thy ſword hath made, Sackes euery vaine and artier of my heart, […]"

2. (in the plural) The entrails of a shrimp.in-plural

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

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

5. A stripe or streak of a different colour or composition in materials such as wood, cheese, marble or other rocks.

6. (figurative) A topic of discussion; a train of association, thoughts, emotions, etc.Examples: "in the same vein"; "He[…]is able to open new scenes, and discover a vein of true and noble thinking."; "Come ride with me Through the veins of history, I'll show you how God Falls asleep on the job"figuratively