[ klot ]
/ klɒt /


verb (used without object), clot·ted, clot·ting.

to form into clots; coagulate.

verb (used with object), clot·ted, clot·ting.

Nearby words

  1. clostridium parabotulinum,
  2. clostridium perfringens,
  3. clostridium tetani,
  4. closure,
  5. closure principle,
  6. cloth,
  7. cloth cap,
  8. cloth of gold,
  9. cloth roll,
  10. cloth yard

Origin of clot

before 1000; Middle English; Old English clott lump; cognate with Middle Dutch klotte, German Klotz block, log (cf. klutz)

Related formsde·clot, verb, de·clot·ted, de·clot·ting.non·clot·ting, adjectiveun·clot·ted, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for clot

British Dictionary definitions for clot


/ (klɒt) /


a soft thick lump or massa clot of blood
British informal a stupid person; fool

verb clots, clotting or clotted

to form or cause to form into a soft thick lump or lumps
Derived Formsclottish, adjective

Word Origin for clot

Old English clott, of Germanic origin; compare Middle Dutch klotte block, lump

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for clot
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for clot


[ klŏt ]


A soft, nonrigid, insoluble mass formed when blood or lymph gels.


To coagulate.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for clot


[ klŏt ]

A soft insoluble mass formed when blood or lymph gels. During blood clotting, white blood cells, red blood cells, platelets, and various clotting factors interact in a cascade of chemical reactions initiated by a wound. When a body tissue is injured, calcium ions and platelets act on prothrombin to produce the enzyme thrombin. Thrombin then catalyzes the conversion of the protein fibrinogen into fibrin, a fibrous protein that holds the clot together. An abnormal clot inside the blood vessels or the heart (a thrombus or an embolus) can obstruct blood flow.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.