#effusion

Noun

[ ih-fyoo-zhuhn ]

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; Middle English (<Anglo-French ) <Latin effūsiōn- (stem of effūsiō), equivalent to ef-ef-+fūsion-fusion

“There is an intensity and effusion of spirit in them, in which his own more studied compositions are somewhat wanting.”
- CHARLES J. ABBEY AND JOHN H. OVERTON, THE ENGLISH CHURCH IN THE EIGHTEENTH CENTURY