Reaction

Definition

The term "reaction" refers to a response to an event, action, or stimulus. It can also describe a chemical process in which substances interact to form new compounds.

Parts of Speech

• Noun

Pronunciation

American English

• IPA Pronunciation: /riˈæk.ʃən/
• Respelling: ree-AK-shuhn

British English

• IPA Pronunciation: /riˈæk.ʃən/
• Respelling: ree-AK-shuhn

Etymology

The word "reaction" originates from the Latin "reactio," meaning "a driving back" or "opposition," derived from "re-" (again) and "agere" (to act). It entered English in the 17th century, initially in the context of physical and chemical processes.

Derivatives

• React (verb)
• Reactive (adjective)
• Reactant (noun)
• Reactivity (noun)
• Overreaction (noun)

Synonyms

• Response
• Answer
• Reply

Antonyms

• Inaction
• Ignorance
• None

Usage

The term "reaction" is commonly used in various fields such as science, psychology, and everyday language. For example, "Her reaction to the surprise was one of joy," or "The chemical reaction produced water and carbon dioxide."

Related Terms

• Response: A verbal or non-verbal reply to a stimulus.
• Interaction: The mutual influence or effect between entities.
• Counteraction: An opposing action or force.

Detailed Definitions

Noun

• A response to an event, action, or stimulus:
  • Example: "His reaction to the news was one of disbelief."
• A process in which two or more substances interact chemically to form new substances:
  • Example: "The chemical reaction between hydrogen and oxygen produces water."
• Opposition or resistance to a force, influence, or idea:
  • Example: "The proposal faced significant reaction from the community."