'Effusion' definitions:

Definition of 'effusion'

noun

An unrestrained expression of emotion [syn: effusion, gush, outburst, blowup, ebullition]

noun

Flow under pressure

From: GCIDE

Effusion \Ef*fu"sion\, n. [L. effusio: cf. F. effusion.]
1. The act of pouring out; as, effusion of water, of blood, of grace, of words, and the like. [1913 Webster]
To save the effusion of my people's blood. --Dryden. [1913 Webster]
2. That which is poured out, literally or figuratively. [1913 Webster]
Wash me with that precious effusion, and I shall be whiter than sow. --Eikon Basilike. [1913 Webster]
The light effusions of a heedless boy. --Byron. [1913 Webster]
3. (Pathol.) (a) 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. (b) The liquid escaping or exuded. [1913 Webster]