injection

American  

[in-jek-shuhn] / ɪnˈdʒɛk ʃən /

noun

1. the act of injecting.

2. something that is injected.

3. a liquid injected into the body, especially for medicinal purposes, as a hypodermic or an enema.

4. state of being hyperemic or bloodshot.

5. Mathematics. a one-to-one function.

6. Also called insertion.  Aerospace. the process of putting a spacecraft into orbit or some other desired trajectory.

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injection British  

/ ɪnˈdʒɛkʃən /

noun

1. fluid injected into the body, esp for medicinal purposes

2. something injected

3. the act of injecting

4. 1. the act or process of introducing fluid under pressure, such as fuel into the combustion chamber of an engine

   2. ( as modifier )

      injection moulding

5. maths a function or mapping for which f( x ) = f( y ) only if x = y See also surjection bijection

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injection Scientific  

/ ĭn-jĕk′shən /

1. A substance that is introduced into a organism, especially by means of a hypodermic syringe, as a liquid into the veins or muscles of the body.

2. A function that maps each member of one set (the domain) to exactly one member of another set (the range).

3. Compare bijection surjection

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Other Word Forms

• injective adjective
• postinjection adjective
• reinjection noun
• superinjection noun

Etymology

Origin of injection

First recorded in 1535–45, injection is from the Latin word injectiōn- (stem of injectiō ). See inject, -ion

Example Sentences

The company said the new plans allow patients to save up to $600 a year on the pill and up to $1,200 a year on the injection.

From The Wall Street Journal

He started chemotherapy soon after the February podcast was recorded and was getting white blood cell injections to help boost his immune system.

From Los Angeles Times

Participants were assigned to receive either evolocumab injections every two weeks or a placebo.

From Science Daily

After Orion separates from the upper stage, it will conduct what is called a translunar injection—the engine firing that commits Orion to soaring out to the moon.

From The Wall Street Journal

Fellow participant Sarah Reeve, who has limited mobility with her hands, said these sessions had given her an "injection of creativity".

From BBC

Related Words

• dose
• needle