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

/ 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

Derived Forms

• inˈjective, adjective

Other Words From

• postin·jection adjective
• rein·jection noun
• super·in·jection 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

This includes unnecessary imaging, medication, injections, even surgery.

From Salon

The UK's Medicines and Healthcare products Regulatory Agency has asked doctors to be alert for patients who may be misusing obesity injections, such as Wegovy.

From BBC

And the findings could spare these children from needing to have a daily injection to boost growth.

From Science Daily

Yet for the past three years she has been given a monthly injection to chemically induce menopause, pausing her periods in an effort to alleviate her symptoms.

From BBC

Greater Manchester's councils will still receive a "desperately needed" £100m cash injection pledged by the previous government, it has been confirmed.

From BBC

Related Words

• dose
• needle