different between exudation vs exsudation

English

exude +? -ation

exudation (countable and uncountable, plural exudations)

The act or process of exuding.
- 1943, “Out of the Fire,” Time, 16 August, 1943,^[1]
  In severe burns, the body loses large amounts of nitrogen, in the urine and by exudation from the burned body surface.
Something that is exuded.
- 2004, Alan Hollinghurst, The Line of Beauty, Bloomsbury, 2005, Chapter 7,
  The car was parked in close to the rustic fence, under the lime trees, and their sticky exudations had already stippled the windscreen.

exsudation (countable and uncountable, plural exsudations)

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