effusion - meaning and definition. What is effusion
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What (who) is effusion - definition

PROCESS OF A GAS ESCAPING THROUGH A SMALL HOLE
Effusive
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effusion         
(effusions)
If someone expresses their emotions or ideas with effusion, they express them with more enthusiasm and for longer than is usual or expected.
I did not embarrass her with my effusions.
N-VAR
Effusion         
·noun The liquid escaping or exuded.
II. Effusion ·noun That which is poured out, literally or figuratively.
III. Effusion ·noun The act of pouring out; as, effusion of water, of blood, of grace, of words, and the like.
IV. Effusion ·noun The escape of a fluid out of its natural vessel, either by rupture of the vessel, or by exudation through its walls. It may pass into the substance of an organ, or issue upon a free surface.
effusion         
n.
1.
Outpouring, efflux, gush.
2.
Shedding, spilling, waste, effuse.
3.
Utterance, expression of thought or sentiment, desultory composition or effort (literary).

Wikipedia

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. Such a hole is often described as a pinhole and the escape of the gas is due to the pressure difference between the container and the exterior. Under these conditions, essentially all molecules which arrive at the hole continue and pass through the hole, since collisions between molecules in the region of the hole are negligible. Conversely, when the diameter is larger than the mean free path of the gas, flow obeys the Sampson flow law.

In medical terminology, an effusion refers to accumulation of fluid in an anatomic space, usually without loculation. Specific examples include subdural, mastoid, pericardial and pleural effusions.

Examples of use of effusion
1. "There was an impressive effusion of blood," Haynes told reporters visiting the base.
2. In no other form would we tolerate this remarkable effusion of 1'th–century vernacular.
3. Celebrating birth is for mums‘ chatrooms, where people announce new arrivals (‘Nappies Galore has another gorgeous boy‘) with an effusion unechoed outside.
4. Even before Lord Saatchi‘s frankly bizarre effusion on the radio yesterday, I was beginning to think that it may have been an understatement.
5. Lee‘s surrender, reminding him of the "hopelessness of further resistance" and urging him to prevent "any further effusion of blood." When Lee finally accepted that reality, Grant was "magnanimous in victory," as Jay Winik writes in "April 1865," his account of that fateful month.