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Effusion (disambiguation) 
Summary
Look up effusion in Wiktionary, the free dictionary.
Effusion is the process of gases passing through a small hole.
Effusion may also refer to:
Medicine edit
The seeping of fluid into a body cavity, the fluid itself, or an abnormal collection of fluid in a body cavity or space:
Geology edit
- Effusive eruption, an effusion of lava from a volcano