coagulation

UK: /kəʊˌægjʊˈleɪʃ^ən/

WordReference Random House Learner's Dictionary of American English © 2026

co•ag•u•late /koʊˈægyəˌleɪt/   v., -lat•ed, -lat•ing. 

1. to change from a fluid into a thickened mass, as blood does when it forms a clot; congeal: [no object]
   The blood from the wound coagulated.
   [~ + object]
   This substance does not coagulate the blood.

co•ag•u•la•tion /koʊˌægyəˈleɪʃən/  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2026

co•ag•u•late  (v. kō ag′yə lāt′;adj. kō ag′yə lit, -lāt′), v., -lat•ed, -lat•ing, adj. 
v.t., v.i. 

1. to change from a fluid into a thickened mass;
   curdle;
   congeal:
   Let the pudding stand two hours until it coagulates.
2. Biochemistry (of blood) to form a clot.
3. Chemistry [Physical Chem.] (of colloidal particles) to flocculate or cause to flocculate by adding an electrolyte to an electrostatic colloid.

adj. 

4. [Obs.] coagulated.

• Latin coāgulāt(us) (past participle of coāgulāre), equivalent. to coāgul(um) coagulum + -ātus -ate¹
• Middle English 1350–1400 for earlier past participle senses "solidified, clotted,'' 1605–15 for def. 1

co•ag′u•la′tion, n. 
co•ag•u•la•to•ry  (kō ag′yə lə tôr′ē, -tōr′ē), co•ag•u•la•tive  (kō ag′yə lā′tiv, -lə tiv), adj.  Synonyms

• 1. clot, set, solidify, thicken.