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

Kilmeade added: “Or involuntary lethal injection or something — just kill ‘em.”

From Los Angeles Times

Kilmeade responded, “Or involuntary lethal injection … or something. Just kill ’em.”

From Salon

Of particular concern is the administration’s injection of partisan ideologies into the scientific grant-making process, shattering applicants’ confidence that their submissions are considered fairly.

From Los Angeles Times

After an intensive care physician failed to revive her, Frédéric Péchier gave her an injection and the patient went into a coma and survived.

From BBC

The injection of youth mixed with experienced World Cup winners from three years ago make New Zealand an intimidating prospect for any side.

From BBC

Related Words

• dose 
• needle