in·fu·sion

[in-fyoo-zhuhn]
noun
1.
the act or process of infusing.
2.
something that is infused.
3.
a liquid extract, as tea, prepared by steeping or soaking.
4.
Pharmacology.
a.
the steeping or soaking of a crude drug in water.
b.
the liquid so prepared.
5.
Medicine/Medical.
a.
the introduction of a saline or other solution into a vein.
b.
the solution used.

Origin:
1400–50; late Middle English < Latin infūsiōn- (stem of infūsiō). See infuse, -ion

re·in·fu·sion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Infusion is always a great word to know.
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an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a stew of meat, vegetables, potatoes, etc.
Collins
World English Dictionary
infusion (ɪnˈfjuːʒən) [Click for IPA pronunciation guide]
 
n
1.  the act of infusing
2.  something infused
3.  an extract obtained by soaking
4.  med introduction of a liquid, such as a saline solution, into a vein or the subcutaneous tissues of the body
 
infusive
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

infusion in·fu·sion (ĭn-fy&oomacr;'zhən)
n.

  1. The process of steeping a substance in water to extract its soluble principles.

  2. A medicinal preparation from such a process.

  3. Introduction of a solution into the body through a vein for therapeutic purposes.

  4. The solution introduced in such a manner.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Infusion of calcium stimulates these packets to fuse with the cell membrane and
  release the neurotransmitter out of the cell.
Some of the patients were in wheelchairs and others had infusion drips attached
  to their arms, the news organization reports.
My hand-to-fingertip messages seem to be the major thing affected by this
  week's chemo infusion.
The sodium infusion got tadpoles to regrow lost tails even if scar tissue had
  already formed over the wound.
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