different between instillation vs distillation

English

From Middle French instillation, from Latin instillatio

instillation (countable and uncountable, plural instillations)

From Middle English distillacioun, from Anglo-Norman distillacioun, from Latin dist?ll?ti?nem, accusative of dist?ll?ti?.

distillation (countable and uncountable, plural distillations)

The act of falling in drops, or the act of pouring out in drops.
That which falls in drops.
(chemistry, chemical engineering) The separation of more volatile parts of a substance from less volatile ones by evaporation and condensation.
1. Purification through repeated or continuous distilling; rectification.
2. (petroleum) Separation into specific hydrocarbon groups; fractionation.
The substance extracted by distilling.
- 1599, William Shakespeare, The Merry Wives of Windsor, III. v. 104:
  to be stopped in, like a strong distillation, with stinking / clothes that fretted in their own grease.
- 1609, William Shakespeare, Sonnet 5:
  Then, were not summer's distillation left,
  A liquid prisoner pent in walls of glass ...

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