vein meaning
EN
[veɪn] [-eɪn] 
US WVein
- In the circulatory system, veins (from the Latin vena) are blood vessels that carry blood toward the heart.
- NounPLveins
- (anatomy) A blood vessel that transports blood from the capillaries back to the heart.
- (used in plural veins) 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 colour or composition in materials such as wood, cheese, marble or other rocks.
- A topic of discussion; a train of association, thoughts, emotions, etc.
- ...in the same vein...
- A style, tendency, or quality.
- The play is in a satirical vein.
- A fissure, cleft, or cavity, as in the earth or other substance.
- (anatomy) A blood vessel that transports blood from the capillaries back to the heart.
- More Examples
- Used in the Middle of Sentence
- the trunk of a vein or of an artery, as distinct from the branches
- We were still chitchatting in the same nothingy vein five minuteslater when George opened his bedroom door.
- The nurse injected a painkilling drug into the veins of my forearm.
- Used in the Ending of Sentence
- In the hepatocyte transplantation model, DPPIV-positive hepatocytes entrapped periportally proliferated, and formed two-layered plates along portal veins.
- The Gladhand Band offers “Taylor's Cafe,” another blues tune in the same hip-grinding vein.
- Used in the Middle of Sentence
Definition of vein in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Nouns
Source: Wiktionary
Grammatically, this word "vein" is a noun, more specifically, a countable noun.