Webster's Revised Unabridged Dictionary · 1913

Effusion

Effusion , noun

[Latin effusio: compare French effusion.]

1.
The act of pouring out; as, effusion of water, of blood, of grace, of words, and the like.
To save the effusion of my people's blood. — Dryden
2.
That which is poured out, literally or figuratively.
Wash me with that precious effusion, and I shall be whiter than sow. — Eikon Basilike
The light effusions of a heedless boy. — Byron
3.
(a) (Pathology) 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)
(Pathology) The liquid escaping or exuded.