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DictionarythrombusBlood clot
noun

thrombus

THRAHM-bus/ˈθrɑmbəs/

A blood clot formed inside a blood vessel or the heart.

A thrombus in the leg can block blood flow.

A close cutaway of a single blood vessel reveals a dark-red clot attached to its inner wall, narrowing the passage, with a few separate red blood cells in the remaining open channel.
Etymology
thrombusGreeklump, blood clot, curd

Greek thrombos could name a lump, a blood clot, or a curd of milk. The medical sense narrows this range to a blood clot formed within a vessel.

In context

Armando Hasudungan1:03
within this blood vessel there is a thrombus forming a blood clot the thrombus is forming through a process known as thrombosis
Pulmonary Embolism - Overview

More examples

  • The ultrasound reveals a thrombus in a deep vein.
  • A thrombus can form inside a chamber of the heart.
  • The medication helps prevent new thrombi from forming.

Forms

thrombus · thrombi

thrombosis noun — Formation or presence of a thrombus.

thrombotic adjective — Relating to the formation of blood clots.

Similar words

clot
Broader term; need not form inside a vessel or the heart.