Pl. coagula. [L. coāgulum means of coagulation, rennet, a sb. of dim. form; from co-agĕre to cause to run together, f. CO- + agĕre to impel.]
† 1. A substance that coagulates a liquid (esp. milk); rennet. Obs.
1658. Sir T. Browne, Gard. Cyrus, Wks. II. 533. The fourth [stomach] the seat of the Coagulum or Runnet.
1672. Phil. Trans., VIII. 4068. Niter is … the natural coagulum of water.
1713. Lond. & Country Brewer, IV. (ed. 2), 282. They introduce a Lentor or Coagulum into the Blood, and impede … its due Circulation.
2. A mass of coagulated matter, a clot of blood.
1658. R. Franck, North. Mem. (1821), 214. The formation of frost or any such like coagulum.
1671. Grew, Anat. Plants, I. vii. § 16. Filled with a most transparent liquor … I have observed it to turn, upon boyling, into a tender white Coagulum.
1767. Gooch, Treat. Wounds, I. 177. Coagula of blood, formed several inches up the arteries.
1771. Watson, in Phil. Trans., LXI. 214. Saturated solutions of salts … forming thick coagulums upon the least motion.
1874. Jones & Siev., Pathol. Anat., 16. One very important end which the fibrine serves is the formation of coagula at the orifice of wounded vessels.
b. That part of the blood which coagulates; the clot.
1800. trans. Lagrange’s Chem., II. 369. If the coagulum of blood be brought into contact with oxygen, the latter is absorbed.
1813. J. Thomson, Lect. Inflam., 219. Is the coagulum ever absorbed while the serum remains unabsorbed?
1885. W. Stirling, trans. Landois’ Physiol., I. 40.
c. fig. An agglutination.
1845. Carlyle, Cromwell (1871), IV. 260. Such a Coagulum of Jargon.
