coagulant (koag ulant)

[L. coagulan ( t- ) s, ppr. of coagulare: see coagulate, v.] A substance that produces coagulation. coagulate (ko-ag'u-lāt), v.; pret. and pp. coag ulated, ppr. coagulating. [L. coagulatus, pp. of coagulare, curdle, curdling, rennet, also lit. a bond, tie: see coagu lum.] I. trans. 1. To curdle; congeal; clot; change from a fluid into a curd-like or thickened ma : as, to coagulate blood; rennet coag IMG:content-0687.png:[blocks in formation] kale, LG. köle, also kol, kal, f., MHG. kol, neut., OHG. cholo, kolo, MHG. kole, kol, m., G. kohle, f., = Icel. Norw. Sw. kol = Dan. kul, neut., coal (in both senses), orig. a burning coal; perhaps connected with Ir. Gael. gual, coal, and ult. with Skt. ✔jval, burn bright, flame. The Goth. word for a burning coal was hauri, perhaps akin to AS. heorth, E. hearth. Cf. F. houille, Walloon hoie, ML. hullæ, mineral coal; Gr. ἀνθραξ, a burning coal, also mineral coal (see anthracite ), L. carbo (n-), a burning coal, charcoal, in mod. use mineral coal (see carbon).] 1. A piece of wood or other combustible substance, either ignited or burning (a "live coal" or "glowing coal"), or burned out or charred (a "dead coal," charcoal, cinder). A quic col berninde ope ane hyeape of dyeade coles [A live coal burning upon a heap of dead coals]. Ayenbite of Inwyt , p. 205. To cold coles sche schal be brent. William of Palerne (E. E. T. S.), 1. 4367. As coals are to burning coals , and wood to fire, so is a contentious man to kindle strife. Prov. xxvi. 21. Shak ., Cor., iv. 6. If he could burn us all into one coal , We have deserv'd it. coagula tet (kō-ag'ū-lāt), a . [ coagulat , coagulatus , pp.: see the verb.] Coagu- 2. A solid and more or le distinctly stratified lated; curdled; clotted. Combust materes and coagulat . Chaucer, Prol. to Canon's Yeoman's Tale, 1. 258. O'er-sized with coagulate gore. Shak., Hamlet, ii. 2. coagulation (kō-ag-u-lā'shon), n. [L. coagu latio (n-), coagulare : see coagulate , v .] 1. The act of changing from a fluid to a thickened curd-like state, well exemplified by the clotting of blood; the state of being coagulated.-2t. The change from a fluid to a solid state, as in crystallization.-3. A ma or quantity of coagulated matter; a curd; a clot. - Coagulation necrosis, in pathol ., a form of necrosis which occurs when a small portion of ti ue is cut off from the circulation, but remains surrounded by, or at least continuous with, ti ue in which the blood continues to circulate. The cells of the ti ue become smaller, distorted, shining, and the nuclei disappear. Coagulation of the blood, the production of filaments of fibrin in the blood, running in every direction, thus forming a spongy ma in which the blood-corpuscles are caught; this ma then contracts, squeezing out the serum.