reactive

/ri:'æktiv/

Thân thiện

The scientist tests a reactive metal in the lab.

Definition

1. Adjective:
   • Reacting to a stimulus: Describing something that responds or changes when acted upon by an external force or event.
   • Participating readily in reactions: In chemistry and physics, describing a substance or element that tends to undergo chemical reactions easily or vigorously.

Usage and Examples

• Adjective:
  • The patient's reactive pupils indicated a healthy neurological response. (Here, 'reactive' describes pupils that change in response to light.)
  • Sodium is highly reactive with water. (Here, 'reactive' describes a chemical property of sodium, meaning it undergoes a reaction easily.)
  • The new security system is reactive, activating only after a breach is detected. (Here, 'reactive' describes a system that responds to an event.)

Advanced Usage

• Reactive Attachment Disorder: A psychological condition where a child has difficulty forming emotional bonds due to neglect.

  • The therapist specialized in treating children with reactive attachment disorder.

• Reactive Power: In electrical engineering, power that oscillates between the source and load in AC systems.

  • Capacitors are used to correct for reactive power in the circuit.

Variants and Related Words

• React (verb): To act in response to something.
  • How did he react to the news?
• Reactivity (noun): The state or degree of being reactive.
  • The experiment measured the metal's reactivity.
• Hyperreactive (adj): Abnormally or excessively reactive.
  • He has a hyperreactive airway, which makes him prone to asthma attacks.

Synonyms

• Responsive: Reacting quickly and positively.
• Sensitive: Quick to detect or respond to slight changes.
• Volatile: In chemistry, easily evaporated or changing; can imply a tendency to react unpredictably.

Antonyms

• Inert: Lacking the ability or strength to move or react.
• Unresponsive: Not reacting or responding.
• Stable: Not easily decomposed or changed; not readily participating in reactions.

Related Phrases and Concepts

• Reactive approach: A strategy focused on responding to events after they occur, as opposed to preventing them.
  • A purely reactive approach to maintenance leads to more downtime.
• Reactive depression: Depression that is an understandable reaction to an external event, such as a loss.
  • Her grief was diagnosed as a case of reactive depression.

Học thuật

Adjective

1. reacting to a stimulus
   • the skin of old persons is less reactive than that of younger persons
2. participating readily in reactions
   • sodium is a reactive metal
   • free radicals are very reactive

Từ đồng nghĩa

• responsive