‖ thrombus Path.
(ˈθrɒmbəs)
[mod.L., a. Gr. θρόµβος lump, piece, clot of blood, curd of milk.]
† a. A small tumour occasioned by the escape of blood from a vein into the adjacent cellular tissue, and its coagulation there. Obs. b. A clot which forms on the wall of a blood vessel or a chamber of the heart, often impeding or obstructing the flow.
milk thrombus, a tumour caused by accumulation of milk in the ducts during lactation (Funk's Standard Dict., 1895).
| 1693 tr. Blancard's Phys. Dict. (ed. 2), Thrombus, the Coagulation of Blood or Milk into Clots or Clusters. 1706 Phillips (ed. Kersey), Thrombus... Among Surgeons a small Swelling that arises after the Operation of Bloud-letting, when the Orifice is made too small. 1866 A. Flint Princ. Med. (1880) 28 A coagulum formed during life in the heart or in the vessels is called a thrombus. 1873 C. H. Ralfe Phys. Chem. 16 A thrombus blocks up a cerebral artery, and acute softening of the cerebral substance supplied by that artery is the result. 1901 Osler Princ. & Pract. Med. i. 12 Inflammation of the arteries with thrombus formation has been frequently described in typhoid fever. 1961 R. D. Baker Essent. Path. v. 82 There is danger of a portion of the thrombus breaking loose and passing as an embolus to the pulmonary artery and lungs. 1970 Passmore & Robson Compan. Med. Stud. II. xxvi. 3/1 In large vessels, the thrombus usually remains plastered as a plaque against the wall of the vessel, whereas in small arteries continuation of the process may lead to an occlusive thrombus which blocks completely the direct blood flow. |