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Medical Term:


Pronunciation: in-fyū′zhŭn


  1. The process of steeping a substance in water, either cold or hot (below the boiling point), to extract its soluble principles.
  2. A medicinal preparation obtained by steeping the crude drug in water.
  3. The introduction of fluid other than blood, saline solution, into a vein.

[L. infusio, fr. in-fundo, pp. -fusus, to pour in]