- the escape of a fluid from its natural vessels into a body cavity.
- the fluid that escapes.
Origin of effusion
Examples from the Web for effusions
These effusions occur most frequently about the knees, the elbows, and the pterygoid muscles of the jaw.
The effusions of blood which are usual in a certain number of Intichiuma are veritable oblations.The Elementary Forms of the Religious Life|Emile Durkheim
His effusions are spread over a dead flat, and can no more get above or below the level, than if they were so much stagnant water.Elementary Guide to Literary Criticism|F. V. N. Painter
But after these effusions he would be seized with furious joy.Child of a Century, Complete|Alfred de Musset
Even South American republics could not be kept together by effusions of republican glory and international love.Martin Van Buren|Edward M. Shepard
- the escape of blood or other fluid into a body cavity or tissue
- the fluid that has escaped
c.1400, "a pouring out," from Middle French effusion (14c.) and directly from Latin effusionem (nominative effusio) "a pouring forth," noun of action from past participle stem of effundere "pour forth, spread abroad," from ex- "out" (see ex-) + fundere "pour" (see found (v.2)). Figuratively, of speech, emotion, etc., from 1650s.