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inject

[in-jekt]
verb (used with object)
  1. to force (a fluid) into a passage, cavity, or tissue: to inject a medicine into the veins.
  2. to introduce (something new or different): to inject humor into a situation.
  3. to introduce arbitrarily or inappropriately; intrude.
  4. to interject (a remark, suggestion, etc.), as into conversation.
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Origin of inject

1590–1600; < Latin injectus past participle of in(j)icere to throw in, equivalent to in- in-2 + -jec- (combining form of jac- throw) + -tus past participle suffix
Related formsre·in·ject, verb (used with object)un·in·ject·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for reinject

inject

verb (tr)
  1. med to introduce (a fluid) into (the body of a person or animal) by means of a syringe or similar instrument
  2. (foll by into) to introduce (a new aspect or element)to inject humour into a scene
  3. to interject (a comment, idea, etc)
  4. to place (a rocket, satellite, etc) in orbit
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Derived Formsinjectable, adjective

Word Origin

C17: from Latin injicere to throw in, from jacere to throw
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for reinject

inject

v.

c.1600, from Latin iniectus "a casting on, throwing over," past participle of inicere "to throw in or on," from in- "in" (see in- (2)) + -icere, comb. form of iacere "to throw" (see jet (v.)). Related: Injectable; injected; injecting.

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Online Etymology Dictionary, © 2010 Douglas Harper

reinject in Medicine

inject

(ĭn-jĕkt)
v.
  1. To introduce a substance, such as a drug or vaccine, into a body part.
  2. To treat by means of injection.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.