A vein is a small tube that carries blood throughout our body.
You often hear about veins when talking about health or injuries. For example, if someone gets a puncture wound, it's because the needle accidentally hit one of their veins and started bleeding. Or maybe you know someone who has bad circulation in their legs and it's because they have a problem with their veins. Doctors might also talk about varicose veins when discussing common health issues with patients.
How common is "vein"?
Word vein is considered uncommon in modern English. It has a balanced usage among all categories: speech, fiction, newspapers and academic texts.
Definitions
noun
A blood vessel that transports blood from the capillaries back to the heart.
(in plural) The entrails of a shrimp.
In leaves, a thickened portion of the leaf containing the vascular bundle.
The nervure of an insect’s wing.
A stripe or streak of a different colour or composition in materials such as wood, cheese, marble or other rocks.
A topic of discussion; a train of association, thoughts, emotions, etc.
Example: in the same vein
A style, tendency, or quality.
Example: The play is in a satirical vein.
A fissure, cleft or cavity, as in the earth or other substance.