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

Customers getting anti-wrinkle injections formulated by Evolus, a medical aesthetics company, are stretching out how frequently they get treatments and reducing the number of injection units they get.

Read more on Wall Street Journal

Michael, who is 58 from Birmingham, says he went to hospital where he was x-rayed and given a tetanus injection, and though he reported it to police he decided not to press charges.

Read more on BBC

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.

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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.”

Read more on Salon

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

Read more on BBC

Related Words

• dose 
• needle