injection

[in-jek-shuhn]

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.

injection

/ 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

injection

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

Other Word Forms

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

Word History and Origins

Origin of injection¹

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

Example Sentences

The current vaccination requires four injections to be given, so another aim is to work out if the same protective dose can be given in a simpler way - perhaps with fewer jabs.

From BBC

When co-host Lawrence Jones suggested that those refusing these programs could be jailed, Kilmeade escalated his rhetoric: “Or involuntary lethal injection, or something. Just kill ’em.”

From Salon

So could it really be that weight-loss injections - for all of their benefits - are turning obesity into a wealth issue?

From BBC

For Aldcroft, the success of Chloe Kelly and company provided that extra injection of inspiration to put consecutive World Cup final defeats behind them and create a legacy of their own.

From BBC

Noem’s actions in Naples suggest the injection of political favoritism into an agency tasked with saving lives and rebuilding communities wiped out by disaster.

From Salon

Related Words

• dose 
• needle