Definition of injector in US English:



  • 1A person or thing that injects something.

    • ‘The positioning and delivery system comprises an injector which is adapted to allow a syringe to be attached and a housing.’
    • ‘Likewise, the use of a nanoscale injector to introduce molecules into a biological cell does no harm to the cell.’
    • ‘And basically, people are familiar with these flavor injectors.’
    • ‘‘Many injectors in the affected areas of Glasgow have said that their recent supply of heroin has required unusually large amounts of citric acid to be added,’ he said.’
    • ‘Almost three-quarters of intravenous drug users who were previously imprisoned reported that they had injected three or more years ago, compared with 36% of injectors among new entrants.’
    • ‘The battlefield was littered with atropine injectors used by panicky Iranian troops as an antidote against Iraqi nerve gas attacks.’
    • ‘Behind every great athlete is a great entourage of massage therapists, doctors, physios, steroid injectors and chiropractors.’
    • ‘But if you have the atropine injectors in the same hands of the people who have the nerve gas, they can become offensive, because then the soldiers use nerve gas with relative impunity.’
    • ‘In their march into Iraq, U.S. Marines discovered Iraqi chemical-biological protection suits and field-syringe injectors filled with a nerve-gas antidote.’
    • ‘By the end of 2001, about 1 million injectors could be infected.’
    • ‘The doctor put a small vial with a colorless liquid onto an injector and placed the nozzle against her upper arm.’
    • ‘The HRB figures show that among new treatment cases, the percentage of injectors had not increased between 1996 and 2000, standing at around a third of users.’
    • ‘They may need to carry an epinephrine injector or some other self-administered emergency treatment.’
    • ‘In Russia, as of 2004, 80 percent of all HIV cases involved drug injectors, and many of these infections occurred because addicts share contaminated needles.’
    • ‘In addition, a more efficient control unit shortens the interval between pre-injection and main injection and the injectors themselves are manufactured to finer tolerances.’
    • ‘The fact that new cases in HIV among injectors are now at their lowest levels since the early 1980s is a testimony to the value of these services.’
    • ‘They are variable volume injectors because they allow the loading of various sample volumes.’
    • ‘After all, a little aesthetics might create a stronger desire to keep the injector with them at all times.’
    • ‘In particular, older injectors may bring a range of knowledge and techniques from other drug using experiences to a new practice, such as crack injection.’
    • ‘Figures published earlier this year showed that the number of heterosexual Scots being diagnosed as HIV-positive had risen to record levels, overtaking figures for people in high-risk groups such as homosexuals and drug injectors.’
    1. 1.1 (in an internal combustion engine) the nozzle and valve through which fuel is sprayed into a combustion chamber.
      • ‘The salient points are that the engine is more powerful thanks to a number of modifications including new camshafts and valves, air filter, intake plenium and injectors to name but a few.’
      • ‘Makers of everything from engine valves to fuel injectors will see their OEM business gradually diminish.’
      • ‘The fuel injector may include a valve body which has longitudinal axis.’
      • ‘A good injector sprays fuel out as a mist and the fuel burns rapidly and relatively clean as the droplets are so small that they burn with a puff!’
      • ‘Both these diesel engines have received new engine management systems to improve refinement and flexibility, as well as new turbo-chargers, new fuel injectors and combustion systems and diesel particulate filters.’
      • ‘It is very difficult to remove the fuel injectors in some engines.’
      • ‘The fuel injectors are found where the intake air runners connect to the cylinder heads.’
      • ‘It is based on solenoid injectors with balanced valve and feedback control strategies.’
      • ‘If it starts every time, I don't think the injectors are leaky.’
      • ‘Extreme heat can also cause wear and tear faster than expected so your Volvo fuel injector must be highly resistant to extreme temperatures.’
      • ‘A fuel injector is nothing more than an electronically controlled valve.’
      • ‘Are both injectors pulsing and spraying while cranking?’
      • ‘Granted, I don't know an intake manifold from a fuel injector, but I bought into their portrayal.’
      • ‘If we were lucky, it wouldn't have gotten sucked into the fuel pump, the fuel line or the injectors.’
      • ‘Carburetors have been replaced by fuel injectors on new vehicles sold throughout the world because carburetors do not control fuel flow precisely enough to meet exhaust emission requirements.’
      • ‘The mechanic told me three of my fuel injectors were clogged and one is completely out of commission.’
      • ‘Our technology is designed to use a single fuel injector that has a capacity to inject two fuels into the engine.’
      • ‘So I replaced the fuel injector and filter.’
      • ‘If you plan to fit used injectors to a performance engine, always have them flow and leak tested first.’
      • ‘In many ways, navigation systems in the U.S. today are what fuel injectors were to cars circa 1954.’
    2. 1.2 (in a steam engine) a system of nozzles that uses steam to inject water into a pressurized boiler.
      • ‘Later, top-feed was introduced, shown by two pipes from the injectors circling the boiler to ‘clack valves’ whence the feed water was able to trickle down a series of trays, mixing with the steam and avoiding much scaling of the metal.’
      • ‘That means short water inlet, short water outlet up to the bundle, short condensate return to heat the tender, but longer piping for the steam to run the pump, and a full-length pipe for cold water all the way back to the injector.’
      • ‘Pumps are more common in warm climates as the injector depends on a temperature difference, i.e. the feed water as cold as possible.’