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Added 10 October 2026

effusion

noun

In Latin: effūsiō Wiktionary

noun Definition from Wiktionary (CC BY-SA). More about effusion at Wordnik → Where our words come from →

A liquid outpouring.
Process of gases passing through a hole or holes considerably smaller than the mean free path of the gas molecules.
An outpouring of speech or emotion.

Origin

Borrowed from Middle French effusion, from Latin effūsiō (“outpouring”). Displaced native Old English āgotennes.

From Wiktionary, via Kaikki.org (CC BY-SA)

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