vein

US /veɪn/
UK /veɪn/
"vein" picture
1.

any of the tubes forming part of the blood circulation system of the body, carrying in most cases oxygen-depleted blood toward the heart

:
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The nurse struggled to find a suitable vein for the injection.
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Varicose veins are often visible on the legs.
:
blood vesselarterycapillary
2.

a streak or stripe of a different color or texture in wood, marble, or other material

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The marble countertop had beautiful gray veins running through it.
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The wood had a distinct dark vein running down its center.
:
streakstripegrainpattern
3.

a particular quality or tendency

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His writing has a humorous vein.
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The conversation took a more serious vein.
:
moodtonestyletendencydisposition
:
pulmonary veinthread veindeep vein thrombosis