A fluid rich in protein and cellular elements that oozes out of blood vessels due to inflammation and is deposited in nearby tissues. The altered permeability of blood vessels permits the passage of large molecules and solid matter through their walls. The vessels seem to weep, to sweat, in keeping with the Latin "exsudare", to sweat out, from which exudate is derived. By comparison, a transudate is a fluid that passes through a membrane which filters out much of the protein and cellular elements and yields a watery solution. The process of transudatation is due to increased pressure in the veins and capillaries pressure forcing fluid through the vessel walls or low levels of protein in the serum. The transudate is a filtrate of blood.
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Any fluid that has exuded out of a tissue or its capillaries, more specifically because of injury or inflammation ( e.g., peritoneal pus in peritonitis, or the e. that forms a scab over a skin abrasion) in which case it is characteristically high in protein and white blood cells. Cf.:transudate. SYN: exudation (2). [L. ex, out, + sudo, to sweat]

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ex·u·date 'ek-s(y)u̇-.dāt, -shu̇- n exuded matter esp the material composed of serum, fibrin, and white blood cells that escapes from blood vessels into a superficial lesion or area of inflammation

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ex·u·date (eksґu-dāt) [L. exsudare to sweat out] material, such as fluid, cells, or cellular debris, which has escaped from blood vessels and has been deposited in tissues or on tissue surfaces, usually as a result of inflammation. An exudate, in contrast to a transudate, is characterized by a high content of protein, cells, or solid materials derived from cells.

Medical dictionary. 2011.

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  • Exudate — Ex*u date, v. t. & i. [See {Exude}.] To exude. [Obs.] Sir T. Browne. [1913 Webster] …   The Collaborative International Dictionary of English

  • Exudate — Ex*u date, n. A product of exudation; an exuded substance. [Webster 1913 Suppl.] …   The Collaborative International Dictionary of English

  • exudate — [eks′yo͞o dāt΄, eks′yo͞odit; egz′yo͞odāt΄, egz′yo͞odāt΄] n. [L exudatus, pp. of exudare: see EXUDE] matter exuded …   English World dictionary

  • Exudate — NOTOC An exudate is any fluid that filters from the circulatory system into lesions or areas of inflammation. Its composition varies but generally includes water and the dissolved solutes of the blood, some or all plasma proteins, white blood… …   Wikipedia

  • exudate — noun A fluid that has exuded from somewhere; especially one that has exuded from a pore of an animal or plant. The whitish lines of exudate seem at times to penetrate even between the straight tubes …   Wiktionary

  • exudate — exude ► VERB 1) discharge or be discharged slowly and steadily. 2) display (an emotion or quality) strongly and openly. DERIVATIVES exudate noun exudation noun exudative adjective. ORIGIN Latin exsudare, from sudare to sweat …   English terms dictionary

  • exudate — I noun a substance that oozes out from plant pores • Syn: ↑exudation • Derivationally related forms: ↑exude (for: ↑exudation), ↑exude • Hypernyms …   Useful english dictionary

  • exudate cells — Leucocytes that enter tissues (exude from the blood vessels) during an inflammatory response. See also peritoneal exudate …   Dictionary of molecular biology

  • exudate — noun Date: 1876 exuded matter …   New Collegiate Dictionary

  • exudate — n. [L. exsudo, discharge by sweating] Any flow from the body or organ through pores or openings by natural discharge …   Dictionary of invertebrate zoology

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