- a mass or lump.
- a semisolid mass, as of coagulated blood.
- a small compact group of individuals: a clot of sightseers massed at the entrance.
- British Informal. blockhead, dolt, clod.
- to form into clots; coagulate.
- to cause to clot.
- to cover with clots: Carefully aimed snowballs clotted the house.
- to cause to become blocked or obscured: to clot the book's narrative with too many characters.
Origin of clot
before 1000; Middle English; Old English clott lump; cognate with Middle Dutch klotte, German Klotz block, log (cf. klutz)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a soft thick lump or massa clot of blood
- British informal a stupid person; fool
- to form or cause to form into a soft thick lump or lumps
Old English clott, of Germanic origin; compare Middle Dutch klotte block, lump
Word Origin and History for unclotted
early 15c., from clot (n.). Of fluids from 1590s. Related: Clotted; clotting.
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
- 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.