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Learn to pronounce ef·fu·sion

/əˈfyo͞oZH(ə)n/
noun
an instance of giving off something such as a liquid, light, or smell.
"a massive effusion of poisonous gas"
synonyms: outflow, outpouring, outflowing, outrush, rush, current, flood, deluge, emission, discharge, issue, spurt, surge, jet, fountain, cascade, spout, stream, torrent, gush, outburst, flow, flux, welling, leakage, escape, voidance, drain, drainage, outflux, emanation, effluence, exudation, efflux

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2. : unrestrained expression of words or feelings. greeted her with great effusion Olive H. Prouty. 3.
(eh-FYOO-zhun) An abnormal collection of fluid in hollow spaces or between tissues of the body. For example, a pleural effusion is a collection of fluid between the two layers of membrane covering the lungs.

Effusion

In physics and chemistry, effusion is the process in which a gas escapes from a container through a hole of diameter considerably smaller than the mean free path of the molecules. Wikipedia
noun · an unrestrained outpouring in speech or words · the act or process of being poured out · something that is poured out · the flow of a gas through a small ...
a sudden and uncontrolled expression of strong emotion: effusion of They were welcomed with effusions of joy wherever they went.
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In medical terminology, an effusion refers to accumulation of fluid in an anatomic space, usually without loculation. Specific examples include subdural, ...
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.
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An effusion is an explosion of something, usually words, ideas, or emotions. A popular singer might inspire an effusion of cheers from her devoted fans.
Pleural effusion, which some people call “water on the lungs,” is the buildup of excess fluid between the layers of the pleura outside your lungs. The pleura ...
Effusion: Too much fluid, an outpouring of fluid. For example, a pleural effusion is an abnormal accumulation of fluid in the pleural space between the lungs ...