injector

injector — noun

1. a tool used to push a liquid medicine, vaccine, or other fluid into a person's o

1.名詞B2
釋義

a tool used to push a liquid medicine, vaccine, or other fluid into a person's or animal's body through a needle or other opening.

例句

The nurse prepared the injector with the flu vaccine before calling the next patient.

collocation: prepare an injector

Dr. Minh used a clean injector to draw a precise dose from a medicine bottle.

collocation: clean injector

同義詞
  • syringe

    a specific type of injector consisting of a tube, plunger, and needle; narrower than 'injector'

  • autoinjector

    a spring-loaded injector that automatically delivers a single dose; a subset of medical injectors

  • pen injector

    a pen-shaped injector with a replaceable cartridge, common for insulin

用法筆記

Frequently used as a general term covering syringes, autoinjectors, and pen injectors. In everyday speech, people often say 'needle' or 'syringe' instead, but 'injector' is the preferred technical term in medical writing and patient instructions.

常見錯誤

❌I need a clean injector for my insulin injection.
✅I need a clean syringe / insulin pen for my insulin injection.
💡'injector' is a category label; in everyday conversation, patients usually name the specific device ('pen', 'syringe', 'pump').

2. a part of an engine that forces fuel into the cylinders or combustion chamber in

2.名詞B2
釋義

a part of an engine that forces fuel into the cylinders or combustion chamber in the form of a fine spray.

例句

The mechanic said dirty fuel injectors — which spray petrol into the engine — caused Binta's car to lose power.

function: injector sprays fuel into engine

Pablo watched the diesel injector spray fuel mist into the test chamber at high pressure.

collocation: diesel injector

同義詞

用法筆記

Almost always appears as 'fuel injector' or combined with the engine type ('diesel injector', 'petrol injector'). The part is typically a solenoid-operated valve, not a simple nozzle.

常見錯誤

❌The fuel injector pumps gasoline into the fuel tank.
✅The fuel injector sprays fuel directly into the engine's cylinders.
💡injectors deliver fuel into the combustion chamber, not into the storage tank.

3. someone or something that introduces a new element into a system or situation, o

3.名詞C1
釋義

someone or something that introduces a new element into a system or situation, often in a noticeable or forceful way.

例句

The new manager acted as an injector of fresh ideas, transforming the entire product line.

collocation: injector of [ideas/energy]

The job-training programme at the centre acted as an injector of hope for struggling families.

同義詞
  • introducer

    more neutral and general, without the implication of force

  • catalyst

    describes something that causes change without necessarily being forceful or direct

反義詞
  • remover

    something that takes elements away rather than adding them

用法筆記

This sense is figurative and less common than the concrete medical or automotive uses. It is typically used with 'of' followed by an abstract noun ('injector of hope / energy / chaos / new ideas').