effusion

/IH0 F Y UW1 ZH AH0 N/
noun
  1. 1

    A liquid outpouring.

  2. 2

    Process of gases passing through a hole or holes considerably smaller than the mean free path of the gas molecules.

  3. 3

    (by extension) An outpouring of speech or emotion.

  4. 4

    The seeping of fluid into a body cavity; the fluid itself.

Source: https://en.wiktionary.org/wiki/effusion