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[verb koh-ag-yuh-leyt; adjective koh-ag-yuh-lit, -leyt] /verb koʊˈæg yəˌleɪt; adjective koʊˈæg yə lɪt, -ˌleɪt/
verb (used with or without object), coagulated, coagulating.
to change from a fluid into a thickened mass; curdle; congeal:
Let the pudding stand two hours until it coagulates.
Biology. (of blood) to form a clot.
Physical Chemistry. (of colloidal particles) to flocculate or cause to flocculate by adding an electrolyte to an electrostatic colloid.
Obsolete. coagulated.
Origin of coagulate
1350-1400 for earlier past participle senses “solidified, clotted,” 1605-15 for def 1; Middle English < Latin coāgulāt(us) (past participle of coāgulāre), equivalent to coāgul(um) coagulum + -ātus -ate1
Related forms
coagulation, noun
[koh-ag-yuh-luh-tawr-ee, -tohr-ee] /koʊˈæg yə ləˌtɔr i, -ˌtoʊr i/ (Show IPA),
[koh-ag-yuh-ley-tiv, -luh-tiv] /koʊˈæg yəˌleɪ tɪv, -lə tɪv/ (Show IPA),
anticoagulating, adjective
anticoagulation, noun, adjective
noncoagulating, adjective
noncoagulation, noun
noncoagulative, adjective
recoagulate, verb, recoagulated, recoagulating.
recoagulation, noun
uncoagulated, adjective
uncoagulating, adjective
uncoagulative, adjective
1. clot, set, solidify, thicken. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for coagulation
Contemporary Examples
Historical Examples
  • As soon as it touches it it penetrates it and the coagulation which we have mentioned is produced.

    The Sexual Question August Forel
  • This acts upon the blood in such a way as to prevent its coagulation.

    The Meaning of Evolution Samuel Christian Schmucker
  • The coagulation of the substance of the brain and of the nervous system goes on.

  • It is frequently desirable to determine the coagulation time.

    A Manual of Clinical Diagnosis James Campbell Todd
  • A coagulation in this crust contained eight million of the creatures, eight million.

    The Huddlers William Campbell Gault
  • Irreversible gelation is usually spoken of as "coagulation."

    The Chemistry of Plant Life Roscoe Wilfred Thatcher
  • This prevents the coagulation of the casein into tough curds.

    Dietetics for Nurses Fairfax T. Proudfit
  • Colloids in a state of coagulation have a vacuolar or sponge-like structure.

    The Mechanism of Life Stphane Leduc
  • The coagulation of milk is also a calcium salt precipitation.

    The Mechanism of Life Stphane Leduc
British Dictionary definitions for coagulation


verb (kəʊˈæɡjʊˌleɪt)
to cause (a fluid, such as blood) to change into a soft semisolid mass or (of such a fluid) to change into such a mass; clot; curdle
(chem) to separate or cause to separate into distinct constituent phases
noun (kəʊˈæɡjʊlɪt; -ˌleɪt)
the solid or semisolid substance produced by coagulation
Derived Forms
coagulable, adjective
coagulability, noun
coagulation, noun
coagulative (kəʊˈæɡjʊlətɪv) adjective
Word Origin
C16: from Latin coāgulāre to make (a liquid) curdle, from coāgulum rennet, from cōgere to drive together
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
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Word Origin and History for coagulation

c.1400, from Latin coagulationem (nominative coagulatio), noun of action from past participle stem of coagulare (see coagulate).



early 15c., from Latin coagulatus, past participle of coagulare "to cause to curdle," from cogere "to curdle, collect" (see cogent). Earlier coagule, c.1400, from Middle French coaguler. Related: Coagulated; coagulating.

Online Etymology Dictionary, © 2010 Douglas Harper
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coagulation in Medicine

coagulation co·ag·u·la·tion (kō-āg'yə-lā'shən)

  1. The change, especially of blood, from liquid to solid; clotting.

  2. A clot; coagulum.

coagulate co·ag·u·late (kō-āg'yə-lāt')
v. co·ag·u·lat·ed, co·ag·u·lat·ing, co·ag·u·lates
To change from the liquid state to a solid or gel; clot.

co·ag'u·la·bil'i·ty n.
co·ag'u·la'tor n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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coagulation in Science
The process of changing from a liquid to a gel or solid state by a series of chemical reactions, especially the process that results in the formation of a blood clot. See more at clot.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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