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effusion

 - 5 dictionary results

ef⋅fu⋅sion

[i-fyoo-zhuhn]
–noun
1. the act of effusing or pouring forth.
2. something that is effused.
3. an unrestrained expression, as of feelings: poetic effusions.
4. Pathology.
a. the escape of a fluid from its natural vessels into a body cavity.
b. the fluid that escapes.
5. Physics. the flow of a gas through a small orifice at such density that the mean distance between the molecules is large compared with the diameter of the orifice.

Origin:
1350–1400; ME (< AF) < L effūsiōn- (s. of effūsiō), equiv. to ef- ef- + fūsion- fusion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ef·fu·sion   (ĭ-fyōō'zhən)   
n.  
    1. The act or an instance of effusing.

    2. Liquid or other matter poured forth.

    3. The seeping of serous, purulent, or bloody fluid into a body cavity or tissue.

    4. The effused fluid.

  1. An unrestrained outpouring of feeling, as in speech or writing: "the devout effusions of sacred eloquence" (Edmund Burke).

  2. Pathology

    1. The seeping of serous, purulent, or bloody fluid into a body cavity or tissue.

    2. The effused fluid.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

effusion 
1402, from L. effusionem (nom. effusio), from stem of effundere "pour forth, spread abroad," from ex- "out" + fundere "pour" (see found (2)).
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: ef·fu·sion
Pronunciation: i-'fyü-zh&n, e-
Function: noun
1 a : the escape of a fluid from anatomical vessels byrupture or exudation b : the flow of a gas through an aperture whose diameter is small as compared with the distance between the molecules of the gas
2 : the fluidthat escapes by extravasation —see PLEURAL EFFUSION
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

effusion ef·fu·sion (ĭ-fy&oomacr;'zhən)
n.

  1. The escape of fluid from the blood vessels or lymphatics into the tissues or a cavity.

  2. The fluid so escaped.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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