injection
/ɪnˈdʒɛkʃ(ə)n
/noun
1An instance of injecting or being injected: painkilling injections an injection of capital was needed...
- There is no proven benefit to topical ointments, suppositories, or injections of local anesthetic.
- The area is numbed with an injection of local anesthetic.
- It also highlighted excessive use of injections and blood transfusions without proper sterilisation.
1.1A thing that is injected: a morphine injection...
- Although I have a very high pain threshold, I was requiring more and more morphine injections.
- The pain subsided more than usual and I was spared the pin cushion process of endless morphine injections.
- Some patients benefit from physical therapy and cortisone injections.
1.2 [mass noun] The action of injecting: the walls have been damp-proofed by injection...
- Usually they are given by intravenous injection, by infusion pump into a vein or orally.
- EDITOR We have three comments about Pickup et al's meta-analysis comparing insulin infusion with injection, which may cast a different light on their main conclusion.
- Samples were introduced by gravity injection from 20 cm height for 20 s.
Synonyms
introduction, instilling, infusion, imbuing, inculcation
1.3 short for fuel injection.Compared to the systems in today's direct-injected diesels, the injection systems will probably operate at lower pressures, which will keep the costs down....
- We are making big inroads with our diesel injection technology, and currently we equip the Duramax and Cummins light truck diesel engines with our components.
- A proportion of the new model was sold with the carry-over, 2.5 litre, 8 valve, indirect injection diesel engine.
2 [mass noun] The entry or placing of a spacecraft or other object into an orbit or trajectory.Since injection into orbit the spacecraft's behaviour has been nominal....
- The spacecraft becomes fully automated after injection into orbit.
- An autonomous telemetry system transmitted data on the payload environment during all the flight phases, from liftoff to in-orbit injection.
3 Mathematics A one-to-one mapping.
Origin
Late Middle English: from Latin injectio(n-), from the verb inicere (see inject).