Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An elastic, insoluble, whitish protein produced by the action of thrombin on fibrinogen and forming an interlacing fibrous network in the coagulation of blood.

from The Century Dictionary.

  • noun A complex nitrogenous substance belonging to the class of proteids.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Physiol. Chem.) A white, albuminous, fibrous substance, formed in the coagulation of the blood either by decomposition of fibrinogen, or from the union of fibrinogen and paraglobulin which exist separately in the blood. It is insoluble in water, but is readily digestible in gastric and pancreatic juice.
  • noun The white, albuminous mass remaining after washing lean beef or other meat with water until all coloring matter is removed; the fibrous portion of the muscle tissue; flesh fibrin.
  • noun An albuminous body, resembling animal fibrin in composition, found in cereal grains and similar seeds; vegetable fibrin.
  • noun (Physiol.) the albuminous bodies, paraglobulin and fibrinigen in the blood, which, by the action of the fibrin ferment, are changed into fibrin, in coagulation.
  • noun (Physiol. Chem.) a ferment which makes its appearance in the blood shortly after it is shed, and is supposed to be the active agent in causing coagulation of the blood, with formation of fibrin.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A white, albuminous, fibrous substance, formed in the coagulation of the blood.
  • noun An elastic, insoluble, whitish protein produced by the action of thrombin on fibrinogen and forming an interlacing fibrous network in the coagulation of blood.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a white insoluble fibrous protein formed by the action of thrombin on fibrinogen when blood clots; it forms a network that traps red cells and platelets

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

fibre +‎ -in (“used to form chemical names of proteins, etc”)

Examples

Comments

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  • "A diseased lung also includes the detritus of dissolved cells, along with various proteins such as fibrin and collagen that are part of the body's efforts to repair damage. (These repair efforts can cause their own problems. 'Fibrosis' occurs when too much fibrin interferes with the normal functioning of the lung."

    —John M. Barry, The Great Influenza (NY: Penguin Books, 2004), 244–245

    February 16, 2009