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

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

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

They added they had also seen grooms opt for injections as well.

From BBC

"I've been taking if for a year, come off insulin and lost 3.5 stones but have just got one week's injections left."

From BBC

The High Court heard on Tuesday that the turnaround plan would see a significant injection of cash into the company.

From BBC

Part of CalypsoAI's solution is a technique called thought injection to steer AI agents in the right direction before they undertake a risky action.

From BBC

After going on the injured list July 6 with left elbow inflammation, he tried three injections and non-invasive rehab procedures, but nothing seemed to work.

From Los Angeles Times

Related Words

• dose 
• needle